CN102645736A - Optical input equipment and transmission type optical lens module of optical input equipment - Google Patents
Optical input equipment and transmission type optical lens module of optical input equipment Download PDFInfo
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- CN102645736A CN102645736A CN2011101768081A CN201110176808A CN102645736A CN 102645736 A CN102645736 A CN 102645736A CN 2011101768081 A CN2011101768081 A CN 2011101768081A CN 201110176808 A CN201110176808 A CN 201110176808A CN 102645736 A CN102645736 A CN 102645736A
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Abstract
The invention discloses optical input equipment and a transmission type optical lens module of the optical input equipment. The transmission type optical lens module can obtain work surface images and comprises a transmission type illuminating system and an imaging system, wherein the transmission type illuminating system comprises a light source, a collimating lens, a prism and a reflector, the collimating lens is positioned in front of the light source, the prism is provided with a reflecting surface, the imaging system comprises an imaging objective lens and an optical image sensor, light beams sent by the light source are projected onto the reflecting surface after being collimated by the collimating lens, are projected onto the reflector after being reflected by the reflecting surface and are finally projected onto the work surface after being refracted by the reflector, the reflecting light of the work surface enters the optical image sensor for imaging through the imaging objective lens. The optical axis of the imaging objective lens and the optical axis of the illuminating system have a smaller illuminating angle, and the view field region near the optical axis center can be illuminated, so light reflected by the partial mirror surface can easily enter the optical image sensor for imaging.
Description
Technical field
The invention relates to a kind of optical input apparatus and optical lens module thereof.
Background technology
To shown in Figure 5, wherein label 1 is collimation lens and prism like Fig. 2, and label 2 is an image-forming objective lens, and label 3 is a light emitting diode, and label 4 is the optical image sensor, and label 5 is a working surface.Because the optical lens of existing optical mouse input equipment adopts the mode of oblique illumination, after the turnover of the light that its light emitting diode 3 sends through the collimation lens of its front and prism 1, with one very wide-angle tilt be radiated on the working surface 5, like mistake! Do not find Reference source.Shown in, the angle of the optical axis of its incident ray and image-forming objective lens 2 is approximately about 75 °, and light is transmitted in the optical image sensor 4 and is carried out to picture.For the general surface of non-high light such as wooden, coloured rough surface partly or blank sheet of paper, because the catoptrical characteristic of its working surface is similar to youth uncle scattering, like mistake! Do not find Reference source.Shown in; Incident light for wide-angle; Also can produce reflected light; Microstructure on the non-high glossy surface is reflected or diffraction produced diffuses to be transmitted in the optical image sensor 4 above the image-forming objective lens 2 and be carried out to picture, and the image that is read according to the optical image sensor carries out computing fast, thus the moving direction of the cursor of control input equipment.About so-called youth uncle scattering, its intensity of reflected light I (θ) is just relevant with the angle theta perpendicular to the normal direction of working surface 5 (like desktop), can be expressed as: I (θ)=I
0Cos (θ), I in the formula
0Be the light intensity perpendicular to the normal direction of desktop orientation, the scattered light strong than high light of youth uncle scattering is the normal direction of reflecting surface to enter into the optical image sensor so scattered light can pass through image-forming objective lens 2 very much.
But for some special working surface; For example the paint face of the marble surface of dark colour surface, high brightness, ceramic tile surface, smoother, minute surface, metal polish surface, printing paper, transparent plastic surface, micronic dust clear glass surface etc.; Because its surface is not irreflexive optical characteristics, traditional optical Genius mouse camera lens just can't be worked on these surfaces.A mistake! Do not find Reference source.For traditional optical Genius mouse camera lens on the surface of partial mirror reflection in (such as paint face of the marble surface of high brightness, ceramic tile surface, smoother, minute surface, metal polish surface, printing paper, transparent plastic surface, micronic dust clear glass surface etc.); Because its character of surface is the partial mirror reflection; Be that major part is a direct reflection in the reflection ray; Having only few part is scattered light, and the reflection angle of this part diffuse light also has relation with the incident angle of incident ray size, and the direction of its strong reflection light is the direction of direct reflection; Become mirror with incident ray with respect to optical axis; Because the angle of reflection ray is too big, the reflected light of desktop almost can not pass through image-forming objective lens 2 and enter into the optical image sensor and be carried out to picture, thus the optical mouse device as placing the blind area cisco unity malfunction.
For transparent fully and surfaces such as optical glass definitely smooth, no any dust above it; Then because most light directly enters into material; The light of few part is then gone out by direct reflection; Its surperficial reflection ray can not pass through image-forming objective lens 2 and enter into the optical image sensor and be carried out to picture, so traditional type mouse camera lens can not operate as normal.
In addition; Optical mouse device because of traditional and present main flow; The mode of its illumination generally all adopts at a certain angle oblique illumination to working surface, so require bigger space can satisfy illumination path projection and reflection, makes the optics fenestra of this optical mouse device lower cover can make its operate as normal when wanting enough greatly; As shown in Figure 5, the length of this optics fenestra W needs 12.5mm approximately.In the course of the work; The optics fenestra of Chang Yinwei input equipment is too big; Dust on the working surface just enters into the surface of optical device very easily; And cause Genius mouse occur to use ineffective, cursor pause stagnant, tremble, phenomenon such as drift, make the optical mouse device function reduction or can't normally use.
Summary of the invention
The objective of the invention is deficiency, a kind of optical input apparatus and penetration optical lens module thereof that can be operated in high finish surface and can improve serviceable life is provided to prior art.
For realizing above-mentioned purpose; The present invention has adopted following technical scheme: a kind of penetration optical lens module of optical input apparatus; Can obtain the image of working surface; Comprise penetration illuminator and imaging system, said penetration illuminator comprises light source, is positioned at the collimation lens in said light source the place ahead, the prism that has reflecting surface and catoptron, and said imaging system comprises image-forming objective lens and optical image sensor; The light beam that said light source sends projects said reflecting surface through behind the said collimation lens collimation; After said reflecting surface reflection, project said catoptron, after said catoptron refraction, finally project working surface, the reflected light of said working surface gets into said optical image sensor imaging via said image-forming objective lens.This finally comprises two kinds of situation: 1) light beam after the refraction of emission mirror directly projects working surface; 2) light beam after the catoptron refraction projects image-forming objective lens, after the image-forming objective lens refraction, projects working surface again.Light beam can be through a following projection surface after the catoptron refraction, and the folded light beam of working surface can be penetrated face through the higher authorities, and this upper and lower projection surface can be curved surface or plane.This upper and lower projection surface can be the surface of image-forming objective lens, also can be the surface of penetration illuminator.
Said light beam project said working surface position and said image-forming objective lens optical axis distance for-0.3mm (being the left side that launching position is positioned at this optical axis)～+ 1.0mm (be the right side that launching position is positioned at this optical axis, catoptron is positioned at the right side of this optical axis).
Projecting the light beam of said working surface and the angle of said optical axis is 1 degree～35 degree.
Said reflecting surface is a fully reflecting surface.
The light beam that projects said catoptron is parallel with said working surface.
Said image-forming objective lens and the compound one of said catoptron.
Said image-forming objective lens separates setting with said emission mirror, and said image-forming objective lens be positioned at said catoptron above or below.When being positioned at the top, the light beam after the catoptron refraction directly projects working surface; When being positioned at the below, the light beam after the catoptron refraction projects working surface again after the image-forming objective lens refraction.
Said image-forming objective lens is bifocus or multifocal binary optical elements.
Said image-forming objective lens is all parallel with the optical axis of image-forming objective lens at the chief ray of each visual field of object space, the rear focus of the contiguous said image-forming objective lens of its aperture diaphragm.
A kind of optical input apparatus comprises described penetration optical lens module.This optical input apparatus such as optical mouse.
The camera lens module of described optical input apparatus; Its except can wooden in major part, coloured uneven surface or irreflexive ordinary desktop such as blank sheet of paper on the operate as normal, its can also be on the paint face of the marble surface of dark colour surface, high brightness, ceramic tile surface, high light, minute surface, metal polish surface, printing paper, transparent plastic surface, micronic dust clear glass surface operate as normal.
The camera lens module of described optical input apparatus, its paraxial illuminator has a catoptron.After the refraction of catoptron thus, shine the light beam of working surface, its incoming position be and image-forming objective lens central optical axis-0.30～+ 1.00 between distance range.
The camera lens module of described optical input apparatus, the catoptron in its illuminator can be designed with dentation curved surface, irregular curved surface and plane.
The camera lens module of described optical input apparatus, its reflecting surface that is used for the prism of leaded light can be one or more, is principle with the catoptron that enables light source is delivered to image-forming objective lens one side.The optical axis angle that after prismatic refraction, incides catoptron can be level and has certain angle, also can be vertical.
The camera lens module of described optical input apparatus; The prism of its illuminator or catoptron can separate with imaging system; Image-forming objective lens can be positioned at the top or the below of prism; Image-forming objective lens also can be positioned at the top or the below of catoptron, and its illuminator and imaging system can be split or one.
The camera lens module of described optical input apparatus; The quantity of the fully reflecting surface of the prism of its light path that is used for transferring can increase and decrease as required; Light source can be that horizontal positioned also can be vertical placement; Or having certain angle places, and the prismatic light guide mode can have multiple according to the set-up mode of light source.
The camera lens module of described optical input apparatus; Its imaging system is a telecentric system; Wherein image-forming objective lens is all parallel with the optical axis of image-forming objective lens at the chief ray of each visual field of object space; Its aperture diaphragm position is positioned near the rear focus of image-forming objective lens, the also certain angle setting of tiltable of its image-forming objective lens.
The camera lens module of described optical input apparatus; Its image-forming objective lens is bifocus or multifocal binary optical (Binary Optics/DOE) element, and wherein image-forming objective lens has a workplace at least for being ring grain diffraction surfaces (English name is Diffractive surface).Image-forming objective lens can adopt binary optical elements (Binary Optics/DOE) design; Can be carried out to picture to the microstructure on the working surface of differing heights, in order to solve as to reach the problem of carrying out work on the glass surface of different-thickness on the rough working surface.
The camera lens module of described optical input apparatus; It can also have two or more light sources; Light source is respectively from different directions, directs light on the catoptron near image-forming objective lens optical axis side through collimation lens and prism respectively to be refracted on the working surface again.
The camera lens module of described optical input apparatus, its light source can be a laser diode perhaps for the light emitting diode of different wave length.
The camera lens module of described optical input apparatus, it can prevent and reduce the surface that dust on the working surface enters into optical device, has the dustproof function.
The camera lens module of described optical input apparatus, the design of its illuminator can make angle (and angle optical axis OZ between) paraxial shine working surface on of the light beam of light source with less degree, and the projection angle can be between 1～35 degree.
The invention has the beneficial effects as follows: 1) optical axis of this illuminator and image-forming objective lens has less irradiating angle, and can shine the field of view near optical axis center, makes the light of partial mirror reflection be easy to enter into the optical image sensor and is carried out to picture; 2) because of illuminator and optical axis less irradiating angle is arranged; Only need very little space just can satisfy the projection and the reflection of illumination path; Can significantly dwindle the optical window hole dimension of input equipment; Make dust on the working surface be difficult to enter into the surface of optical device and realized the dustproof function, improved usability and life-span.
Description of drawings
Fig. 1 is the light path principle figure of optical input apparatus of the present invention;
Fig. 2 is the light path principle figure of existing optical mouse input equipment;
Fig. 3 is that the optical lens of existing optical mouse input equipment is used in the condition diagram on the bright diffuse reflection surface of non-height;
Fig. 4 is that the optical lens of existing optical mouse input equipment is used in the condition diagram that reflects on the high glossy surface;
Fig. 5 is the optical lens of existing optical mouse input equipment and the structural representation of optics fenestra;
Fig. 6 is the optical lens module of optical input apparatus of the present invention and the structural representation of optics fenestra;
Fig. 7 is that the optical lens module of optical input apparatus of the present invention is used in the condition diagram on the bright diffuse reflection surface of non-height;
Fig. 8 is that the optical lens module of optical input apparatus of the present invention is used in the condition diagram that reflects on the high glossy surface;
Fig. 9 relates to the present invention's the structural representation of image-forming objective lens above illuminator;
Figure 10 relates to the present invention's the structural representation of image-forming objective lens below illuminator;
Structural representation when the light source that Figure 11 relates to the present invention vertically is provided with;
Figure 12 is the partial enlarged drawing at P indication place among Fig. 6;
Figure 13 is the stereographic map of penetration optical lens module of the present invention;
Figure 14 is the stereographic map at another visual angle of penetration optical lens module of the present invention;
Figure 15 is the front view of penetration optical lens module of the present invention;
Figure 16 is the cut-open view of Figure 15 along the A-A direction;
Figure 17 is the vertical view of penetration optical lens module of the present invention.
Embodiment
Combine accompanying drawing that the present invention is done further explain through embodiment below.
One of them embodiment such as a mistake involved in the present invention! Do not find Reference source., Figure 12 is to shown in Figure 17, this penetration optical lens module has comprised a penetration illuminator and an imaging system.The penetration illuminator comprise a light source 3, light source front collimation lens 15, be used for the prism 1 of leaded light and with the refraction of optical beam to the catoptron 11 of working surface.The light that sends from light source 3 (like light emitting diode) is through the collimation lens 15 of front laggard the inciding in the deflecting prism 1 that collimate.Collimated light is totally reflected to two reflectings surface 13,12 in addition through the reflecting surface 14 of prism; Again via the total reflection of the reflecting surface 13,12 of prism; With this two light beam synthetic produce light beam L1 and project with the fit catoptron 11 of image-forming objective lens on; Synthetic light beam L1 produces light beam L2 after catoptron 11 refractions, via producing light beam L3 after projection surface under the image-forming objective lens 21 (aspheric curve) refraction and projecting on the working surface 5,5 reflections produce light beam L4 through working surface again; This folded light beam L4 sees through image-forming objective lens refraction back and produces light beam L5; The imaging in the optics image sensor 4 of going forward side by side, the image that is read by the optical image sensor carries out computing fast, thereby realizes the control that the cursor of input equipment moves.The position of light beam L3 projection is the field of view from the optical axis OZ centre distance+0.40mm of image-forming objective lens, the position of this projection can be for-0.3～+ 1.00mm, be preferably here+0.40mm.The technical characterictic of this penetration illuminator is: the light source in this optical system passes through this penetrable image-forming objective lens excessively in penetration illuminator refraction back, and can directly project from very approaching image visual field, optical axis OZ central area.Machinery that this optical input apparatus relates to and circuit structure are prior art, repeat no more at this.
Imaging system in the optical system of the present invention then comprises working surface 5, image-forming objective lens 2 that is identified and the optical image sensor 4 that is positioned at image-forming objective lens 2 tops.Image-forming objective lens 2 comprises that projection surface 22 reaches projection surface 21 down, and these two workplaces can all be aspheric curve; Sensor then comprises darkroom 41 and CMOS photo-sensitive cell 42.The imaging system technical characterictic of this penetration optical lens module is: this imaging system has the long depth of field, and image-forming objective lens adopts binary optical elements (Binary Optics/DOE) design, can be carried out to picture to the microstructure on the differing heights working surface.This image-forming objective lens is also compound and be integrated in one with the catoptron of penetration illuminator 11.
The invention still further relates to a kind of dust control technology; Because of this penetration optical lighting system can incide working surface with less irradiating angle (and the angle between the imaging optical axis OZ) with light source; Just can satisfy illumination path projection and reflection so only need very little space; As shown in Figure 6, the length of the optics fenestra W1 of input equipment only needs 2.50mm, compares the optical window hole dimension that the traditional optical input equipment can significantly dwindle input equipment; Make dust on the working surface be difficult to enter into the surface of optical device and realized the dustproof function, improved usability and life-span.
In addition, optical input apparatus involved in the present invention comprises that also the periphery is used for the non-optic portion 16 of assembling and fixing, and this part and illuminator and imaging system are integrated into an optical mode set of pieces body, can be the moulding of one mode, also can be split type.
Optical input apparatus involved in the present invention, when it was operated on the general surface (like wooden, coloured rough surface or blank sheet of paper etc. the non-high light surface), its principle of work was as shown in Figure 7.Because the catoptrical characteristic of its working surface 5 is similar to youth uncle scattering; Incident light for any angle; All can produce reflected light in all directions; Microstructure on the working surface of non-high light reflect or diffraction produced diffuses to be transmitted in the top optical image sensor 4 of image-forming objective lens 2 and be carried out to picture, and the image that is read according to the optical image sensor carries out computing fast, thereby controls the moving direction of the cursor of optical input apparatus.
Optical system involved in the present invention is characterized by and can be operated on some special surface, for example operate as normal on the paint face of the marble surface of dark colour surface, high brightness, ceramic tile surface, high light, minute surface, metal polish surface, printing paper, transparent plastic surface, the micronic dust clear glass surface.The design of its penetration illuminator can make angle (and angle optical axis OZ between) paraxial shine working surface on of the light beam of light source with less degree; The angle of present scheme is 14 degree; When the optical characteristics of working surface 5 was direct reflection, according to reflection law, this reflected light can project image-forming objective lens 2 in the other direction with the angle of-14 degree; And the process image-forming objective lens enters into 4 imagings of optical image sensor; As shown in Figure 8, optical input apparatus can carry out computing fast according to the image that the optical image sensor is read, thereby realizes the cursor control of optical input apparatus.Here the projection angle of the optical axis OZ of image-forming objective lens can be 1～35 degree, is preferably 14 degree here.According to above-mentioned principle of work, optical system involved in the present invention can operate as normal on multiple high glossy surface, have stronger image information picked-up ability.
Optical system involved in the present invention, its penetration illuminator also can be separated by independent with imaging system, and image-forming objective lens can be above or below illuminator, and non-certain needs are integrated on the same element.Fig. 9 is the embodiment of imaging system above illuminator; The last projection surface of original image-forming objective lens is replaced by projection plane 55 and following projection plane 54 with following projection surface; The catoptron 53 of illuminator also can be the plane; An image-forming objective lens 52 is set above illuminator separately, and the reflected light that incides on the working surface 5 is imaged in the optical image sensor 4 after descending projection plane 54 and last projection plane 55 and image-forming objective lens 52.Figure 10 is the embodiment of imaging system below illuminator; The last projection surface that originally was used for doing the imaging object lens is replaced by projection plane 64 and following projection plane 65 with following projection surface; Catoptron 63 on the illuminator also can be curved surface; An image-forming objective lens 62 is set below illuminator separately, and the reflected light that incides on the working surface sees through this image-forming objective lens 62 and projection plane 65, upward projection plane 64 backs imaging in optical image sensor 4 down.
The quantity of fully reflecting surface of prism of light path of being used in its illuminator of optical system involved in the present invention transferring can increase and decrease as required, and the prismatic light guide mode can have multiple, reflects as long as can and import on the catoptron 11 optical alignment of light source.Figure 11 is another scheme that light source is vertically placed on the prism top, and the reflecting surface of deflecting prism has also reduced one, and makes former fully reflecting surface 12 and 13 into a reflecting surface 72.
Above content is to combine concrete embodiment to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. the penetration optical lens module of an optical input apparatus; Can obtain the image of working surface; It is characterized in that: comprise penetration illuminator and imaging system; Said penetration illuminator comprises light source, is positioned at the collimation lens in said light source the place ahead, the prism that has reflecting surface and catoptron; Said imaging system comprises image-forming objective lens and optical image sensor, and the light beam that said light source sends projects said reflecting surface through behind the said collimation lens collimation, after said reflecting surface reflection, projects said catoptron; After said catoptron refraction, finally project working surface, the reflected light of said working surface gets into said optical image sensor imaging via said image-forming objective lens.
2. the penetration optical lens module of optical input apparatus as claimed in claim 1 is characterized in that: said light beam project said working surface position and said image-forming objective lens optical axis distance for-0.3mm～+ 1.0mm.
3. the penetration optical lens module of optical input apparatus as claimed in claim 2 is characterized in that: projecting the light beam of said working surface and the angle of said optical axis is 1 degree～35 degree.
4. the penetration optical lens module of optical input apparatus as claimed in claim 1, it is characterized in that: said reflecting surface is a fully reflecting surface.
5. the penetration optical lens module of optical input apparatus as claimed in claim 1, it is characterized in that: the light beam that projects said catoptron is parallel with said working surface.
6. the penetration optical lens module of optical input apparatus as claimed in claim 1 is characterized in that: said image-forming objective lens and the compound one of said catoptron.
7. the penetration optical lens module of optical input apparatus as claimed in claim 1, it is characterized in that: said image-forming objective lens separates setting with said emission mirror, and said image-forming objective lens be positioned at said catoptron above or below.
8. the penetration optical lens module of optical input apparatus as claimed in claim 1, it is characterized in that: said image-forming objective lens is bifocus or multifocal binary optical elements.
9. the penetration optical lens module of optical input apparatus as claimed in claim 1, it is characterized in that: said image-forming objective lens is all parallel with the optical axis of image-forming objective lens at the chief ray of each visual field of object space, the rear focus of the contiguous said image-forming objective lens of its aperture diaphragm.
10. an optical input apparatus is characterized in that: comprise any described penetration optical lens module among the claim 1-9.
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| CN201110176808.1A CN102645736B (en) | 2011-02-21 | 2011-06-16 | Optical input equipment and transmission type optical lens module of optical input equipment |
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| CN201110176808.1A CN102645736B (en) | 2011-02-21 | 2011-06-16 | Optical input equipment and transmission type optical lens module of optical input equipment |
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| CN107023790A (en) * | 2016-01-11 | 2017-08-08 | 法雷奥照明公司 | Lighting device equipped with bending Wavelength changing element and the headlamp including the device |
| CN113811806A (en) * | 2019-05-29 | 2021-12-17 | 松下知识产权经营株式会社 | Optical system, image projection device, and imaging device |
| CN114222054A (en) * | 2022-01-14 | 2022-03-22 | 维沃移动通信有限公司 | Camera module and electronic equipment |
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| CN114222054A (en) * | 2022-01-14 | 2022-03-22 | 维沃移动通信有限公司 | Camera module and electronic equipment |
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Effective date of registration: 20160705 Address after: 523129 Guangdong city of Dongguan province and long industrial zone Dalang Town Park Road No. 18 Patentee after: Mikolta Optoelectronic Technology Co., Ltd. Address before: Longgang District of Shenzhen City, Guangdong province 518000 Buji Bantian Sijihuacheng garden D102 Patentee before: Lang Huanbiao |