CN1460889A - Camera device and camera lens - Google Patents
Camera device and camera lens Download PDFInfo
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- CN1460889A CN1460889A CN03136947A CN03136947A CN1460889A CN 1460889 A CN1460889 A CN 1460889A CN 03136947 A CN03136947 A CN 03136947A CN 03136947 A CN03136947 A CN 03136947A CN 1460889 A CN1460889 A CN 1460889A
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- lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/091—Digital circuits
- G03B7/093—Digital circuits for control of exposure time
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- Lenses (AREA)
Abstract
The object of the invention is to easily manufacture a shutter member without being constrained by an imaging lens and an image pickup element and to protect the imaging lens when a user does not photograph. The shutter member 14 is disposed on the side of an object of the imaging lens 25. Then, the shutter member is easily designed and manufactured, while the shutter member is not constrained by the imaging lens and the image pickup device, thereby attaining the miniaturization and thinness of the shutter member, accordingly attaining the miniaturization and thinness of the entire camera. When the camera is not used for photographing, the shutter member protects the imaging lens. In this case, arranging the shutter member as a different configuration on the side of the object of an imaging unit 13 obtained by uniting the imaging lens 25 with the image pickup device into one body makes it easy to adjust the position of the shutter member with respect to the imaging unit. This facilitates assembling work of the imaging unit and the shutter member with high accuracy, thereby improving the productivity.
Description
Invention field
The present invention relates to digital camera (DSC), cassette video camera (camera), portable telephone set, monitoring camera, PC video camera (camera head that personal computer is affiliated), also relate to the high performance mini pick-up lens that uses in the small-sized image pickup device that uses CCD imaging apparatuss such as (charge-coupled image sensors).
Background technology
In employed camera heads such as for example cassette video camera, be provided with imaging apparatus and mechanical shutter parts such as pick-up lens, CCD, between pick-up lens and imaging apparatus, dispose shutter part, open by making this shutter part opening and closing movement, take in the picture of subject and project on the imaging apparatus with pick-up lens, and take out as view data after converting this picture that is projected to electric signal with imaging apparatus.
At this,, will find because the high pixel of use CCD ground takes out image, so similar with pick-up lens on the structure with VTR if note the pick-up lens of existing digital video camera (DSC).But aspect resolution and image quality, owing to require higher performance, the most cases structure becomes complicated, the size of relevant optical system, even the screen size of CCD is identical, DSC still maximizes with pick-up lens than VTR with pick-up lens.Below, the summary of relevant existing DSC with the feature of pick-up lens enumerated in examination.
1. high image quality
Recently, the pixel quantity of CCD is also arranged is 3,000,000 pixels～4,000,000 pixels to general purpose DSC.Because the screen size difference is directly more nonsensical with the imaging apparatus of 350,000 Pixel-level that are used for VTR, if but ignore screen size, then there is 10 times difference to exist approximately.That is to say, can think that also there is the difference about above-mentioned difference in the precision (difficulty) of the desired optical aberration correcting of pick-up lens.
In order to improve the pixel quantity of CCD, general now employing does not increase screen size as far as possible but utilizes the method that pixel pitch (pitch) is reduced to improve pixel quantity, for example, in the valid pixel quantity of announcing recently that is used for digital video camera is the CCD of 1,300,000 Pixel-level, and pixel pitch is roughly 4.2 μ m.Therefore, even supposing minimum entanglement radius is 2 times of pixel pitch i.e. 8.4 μ m, owing to consider that the minimum entanglement radius of 35mm silver chloride video camera is roughly 33 μ m, the desired resolution of pick-up lens that also we can say digital video camera is roughly 4 times of silver chloride video camera.
2. picture side telecentric iris (telecentric) property is good
So-called telecentric iris as side is meant the final face of the chief ray ejaculation optical system of the light shafts of each picture point afterwards almost parallel with optical axis, just almost intersects vertically with image planes.In other words, the ejaculation pupil position of optical system is apart from the image planes sufficient distance.This is because the chromatic filter on the CCD is positioned at the position of leaving a little apart from shooting face, and when light is being penetrated incident, the aperture efficiency of essence reduces, so particularly in nearest ISO type CCD, mostly with the dead ahead of micro lens array configurations at the shooting face, at this moment too, do not leave enough distances if penetrate pupil, then Zhou Bian aperture efficiency can reduce.
3. need big back focal length (back focus)
Glass plate that is used to protect that causes because of the structure of CCD and space thereafter, the space (back focal length) that between the optical system of pick-up lens and CCD, generally needs to insert several optical elements.To prevent that the periodic structure because of CCD from causing that ripple (the モ ア レ) phenomenon etc. of generation is a purpose, insert optics optical low-pass filter (being designated hereinafter simply as OLPF, LP) and phase-plate (PP),, between optical system and CCD, insert infrared Absorption optical filtering filter (IR) so that thereby the relative sensitivity that the light sensitivity in the infrared wavelength territory of CCD reduces near human eye is a purpose.
As mentioned above, the pick-up lens of existing DSC mainly has 3 features (condition), and present situation is in order to realize 2 and 3, the choice criteria of having to camera lens even negative focal length (retrofocus) type.This has hindered the miniaturization of pick-up lens greatly.
But, in such camera, owing between pick-up lens and imaging apparatus, disposing shutter part, so shutter part is subjected to the restriction of pick-up lens and imaging apparatus, therefore the design of shutter part and make complicated and the trouble that becomes, and must pick-up lens and imaging apparatus aimed on the basis of correct position on the optical axis, also must between them, aim at the position of shutter part, so, have problems such as assembly operation trouble, productivity difference to the demanding precision of the assembling operation of pick-up lens, imaging apparatus and shutter part.
And; in this camera head; owing between pick-up lens and imaging apparatus, disposing shutter part; so pick-up lens also exposes when not using; pick-up lens is made dirty or injured; therefore in order to protect pick-up lens also to need lens cap, there is the problem that increases number of components in this with regard to making.
Problem of the present invention is can not be subjected to the restriction of pick-up lens and imaging apparatus, easily make shutter part, and can protect pick-up lens when not photographing.In addition, another problem of the present invention is precision well and easily to assemble pick-up lens, imaging apparatus and shutter part.
Summary of the invention
The present invention puts forward in view of the above problems, its purpose is to provide a kind of pick-up lens, in the photographic optical system of using imaging apparatus, subject side at above-mentioned imaging apparatus, possesses the lens group that constitutes by a plurality of pick-up lenss, subject side configuration infrared absorption light filter by in above-mentioned lens group can shorten back focal length, and can realize miniaturization.
(1) a kind of camera head of the present invention, be projected on the imaging apparatus by the picture of pick-up lens subject, by above-mentioned imaging apparatus the picture that this is projected is taken out as view data, it is characterized in that: in the subject side of above-mentioned pick-up lens, configuration covers the shutter part of above-mentioned pick-up lens, so that the time shutter during the decision photography.
If employing the present invention; then owing to shutter part is configured in the subject side of pick-up lens; so shutter part is not subjected to the restriction of pick-up lens and imaging apparatus; therefore can easily carry out the design and the making of shutter part; and can realize the miniaturization and the slimming of shutter part thus; miniaturization and slimming that thereupon can implement device integral body; and because switch freely cuts out shutter part and covers pick-up lens when not photographing; so can protect pick-up lens really, so that pick-up lens is made dirty or injured by shutter part.
(2) a kind of camera head of the present invention, be projected on the imaging apparatus by the picture of pick-up lens subject, by above-mentioned imaging apparatus the picture that this is projected is taken out as view data, it is characterized in that: make that above-mentioned pick-up lens and above-mentioned imaging apparatus are integrated to constitute image unit, subject side at this image unit, configuration covers the shutter part of above-mentioned pick-up lens, so that the time shutter during the decision photography.
If employing the present invention, then owing to subject side at pick-up lens and the incorporate image unit of imaging apparatus, split configuration shutter part, so have outside the action effect identical with (1), also special since only the position that image unit is aimed at shutter part get final product, so can precision well and easily carry out the assembling operation of image unit and shutter part, and can realize productive raising thus.
(3) as (1) or (2) described camera head, it is characterized in that: in the above-mentioned subject side of above-mentioned pick-up lens and at the image planes side of above-mentioned shutter part, configuration fixed aperture.
If employing the present invention, then have outside the action effect identical with (1) or (2), special because in the above-mentioned subject side of above-mentioned pick-up lens and at the image planes side configuration fixed aperture of above-mentioned shutter part, so can be at the utmost point near position configuration shutter part of fixed aperture, it is inhomogeneous to prevent from thus to expose, and because aperture is a fixed aperture, compare with the situation of using movable aperture, can constitute shutter part, miniaturization and slimming that thus can implement device integral body small-sizedly.
(4) as (1) to (3) each described camera head, it is characterized in that: at least a portion of above-mentioned shutter part is configured in the inside that is located at the lip-deep ornamental portion of body housing.
If employing the present invention, then have outside the action effect identical with (1), (2) or (3), special at least a portion at the above-mentioned shutter part of internal configurations that is located at the lip-deep ornamental portion of body housing, the slimming of body housing of camera head that can realize packing into, and can realize the miniaturization and the slimming of equipment integral thus.
(5) a kind of pick-up lens, in the photographic optical system of using solid-state imager, subject side at above-mentioned solid-state imager, possesses the pick-up lens group that constitutes by a plurality of camera lenses, by subject side, the back focal length of above-mentioned photographic optical system is shortened with infrared absorption filter configuration above-mentioned camera lens of the most close subject side configuration in above-mentioned pick-up lens group.
If employing the present invention then can obtain high-performance and small-sized pick-up lens.
(6) as (5) described pick-up lens, it is characterized in that: also between above-mentioned solid-state imager and above-mentioned pick-up lens group, dispose the optics optical low-pass filter.
If employing the present invention then can further obtain high-performance and small-sized pick-up lens.
Description of drawings
Fig. 1 is the oblique view of seeing from front face side behind application the present invention in the cassette video camera.
Fig. 2 is that side is seen the oblique view of the cassette video camera of Fig. 1 from behind.
Fig. 3 is the exploded perspective view that the camera head of Fig. 1 is shown.
Fig. 4 is the outboard profile of Fig. 3.
Fig. 5 is the expansion sectional view of the image unit of Fig. 3.
Fig. 6 is the lens construction figure that adopts an embodiment of small-sized image pickup camera lens of the present invention.
Fig. 7 is the various aberration diagrams of the small-sized image pickup camera lens of an embodiment.
Fig. 8 is the lens construction figure of the pick-up lens of existing example.
Fig. 9 is the various aberration diagrams of the pick-up lens of existing example.
Embodiment
(embodiment 1)
Below, in the cassette video camera, use an embodiment of camera head of the present invention with reference to Fig. 1～Fig. 5 explanation.
Shown in Figure 1 is the oblique view of seeing cassette video camera of the present invention from front face side, shown in Figure 2 is that side is seen the oblique view of cassette video camera of the present invention from behind, shown in Figure 3 is the exploded perspective view of Fig. 1 major part, and Fig. 4 is the outboard profile of Fig. 3, and shown in Figure 5 is the expansion oblique view of the image unit of Fig. 3.
As depicted in figs. 1 and 2, this cassette video camera possesses video camera 1 main body 1.This camera body 1 is made of fore shell 2 and back cover 3, and any one of this fore shell 2 and back cover 3 all is to be formed by the high metal thin plate of rigidity such as stainless steel.
This situation as shown in Figure 1, is provided with camera 4 in the upper right corner of fore shell 2 fronts, is provided with optical finder 5 at the position that is positioned at its left side, and the position in left side is provided with flashlamp illuminating part 6 being positioned at more.And the front, left side (right side of Fig. 2) at the upper surface of this fore shell 2 and back cover 3 is provided with shutter release button 7 and the 1st menu button 8.On the other hand, as shown in Figure 2, the position in (front of Fig. 2) left side is provided with display part 9 in the back that is positioned at back cover 3, and being provided with at the position that is positioned at its right side can be towards the indication key 10 of cross direction operation.Be respectively equipped with the 2nd menu button 11, power key 12 at the position that is positioned at these cursor key 10 upsides and right side, in addition,, optical finder 5 be set continuously from back cover 2 sides at the position that is positioned at display part 9 upsides.
The structure of camera head 4 as shown in Figure 3 and Figure 4, the shutter part 14 that it possesses image unit 13 and is used to determine the time shutter, subject side (side nearby of Fig. 3) at image unit 13 is disposing shutter part 14, and optical finder 5 is being set at the sidepiece (left side of Fig. 3) of this image unit 13, in video camera body 1, assemble image unit 13, shutter part 14 and optical finder 5 with this state.This situation, image unit 13 constitutes as shown in Figure 5, be provided with image pickup part 17 and quartzy light filter 18 in its holding components 16 on being arranged on substrate 15, leading section (with the left part of figure) at this holding components 16 is provided with camera lens part 19, and each center configuration of these image pickup parts 17, quartzy light filter 18 and camera lens part 19 is become to be positioned at state on the optical axis 20.
The structure of image pickup part 17 as shown in Figure 5, it possesses fixed station 21 on the substrate 15 that is arranged in the holding components 16, be accommodated in the imaging apparatuss such as CCD 22 in the recess 21a of this fixed station 21 and be arranged on the cover glass 23 that covers this imaging apparatus 22 on the fixed station 21, and imaging apparatus 22 is according to the picture output electric signal of the subject of being taken in by camera lens part 19.Quartzy view finder 18 is optics optical low-pass filters, with the state configuration corresponding with the subject side (left side of Fig. 5) of image pickup part 17 in holding components 16.The structure of camera lens part 19 is as follows, and the lens barrel 24 that it possesses the leading section (left part of Fig. 5) that is installed in holding components 16 is setting gradually pick-up lens 25 and fixed aperture 26 from image planes side (right side of Fig. 5) in this lens barrel 24.
This situation, lens barrel 24 forms cylindric as shown in Figure 5, and the center section of portion forms the flange 27 that supports pick-up lens 25 within it.The inner peripheral surface of this flange 27 forms following taper (taper), be that the diameter of subject side (with the left side of figure) is bigger and compare the diameter of image planes side (with the right side of figure) with this diameter bigger than the lens function of pick-up lens 25 part, so that do not limit the field angle of fixed aperture 26 decisions.In addition, the subject side of the flange 27 in this lens barrel 24 (with the left side of figure) is formed for installing the installation recess 28 of pick-up lens 25 and fixed aperture 26.And, screw togather by pin thread 24a that will on these lens barrel 24 outer peripheral faces, form and the female screw 16a that on the inner peripheral surface of holding components 16, forms, this lens barrel 24 is installed on the holding components 16.
In addition, as shown in Figure 5, pick-up lens 25 is concave surface falcate (meniscus) convex lens towards subject side (with the left side of figure), and it is identical or than its thinner flat condition that its peripheral part forms camera lens thickness with central part.This pick-up lens 25 inserts from the subject side and installs in the recess 28, and the back of the flat condition of its peripheral part (with the right flank of figure) is bonded in to be fixed on the flange 27 by bonding agent and installs in the recess 28.Enough thin lamellar of the camera lens thickness that fixed aperture 26 forms relative pick-up lens 25, its profile forms roughly identical or bigger than it with pick-up lens 25, and heart portion formation therein is central circular through hole 26a with optical axis 20.This fixed aperture 26 inserts from the subject side and installs in the recess 28, and snugly fitted into the front (with the left side of figure) of pick-up lens 25, and roughly constitute conplane state with the front (with the left surface of figure) of fixed aperture 26 and the front end face of lens barrel 24, utilize bonding agent that this fixed aperture 26 is fixed on and install in the recess 28.
On the other hand, the structure of shutter part 14, as shown in Figure 3, it possesses fast door shell 30, in this fast door shell 30, reverse blade 31 is installed possibly, and the actuator 32 that drives blade 31 is installed on this fast door shell 30, by blade 31 being reversed by this actuator 32, make circular fast aperture of door 33 foldings by blade 31, this circle shutter 33 is set at central part and break-through its surface and the back side (Fig. 3's is forward and backward) of fast door shell 30.At this moment, fast door shell 30 as shown in Figure 3 and Figure 4, is incorporated in the ornamental portion 34 of fore shell 2 with the state on the optical axis that is centered close to image unit 13 20 of its fast aperture of door 33.
The structure of ornamental portion 34 is as follows, and it is made of the support 35 of the inner face side that is located at fore shell 2 (the back side of Fig. 3) and the rosette 36 that is located at the front face side (side nearby of Fig. 3) of fore shell 2, and fast door shell 30 is installed on the fore shell 2 by means of support 35.That is to say that support 35 forms the roughly circular plate shape with difference in height by absorbing the soft synthetic resin that impacts as shown in Figure 3 and Figure 4.In the inside of this support 35, be provided with the housing recess 37 that fast door shell 30 inserts, in its leading section (end of the side nearby of Fig. 3), with the fast aperture of door 33 corresponding through hole 35a that circle is being set of fast door shell 30.
In addition, the structure of this support 35 as shown in Figure 4, its leading section (with the figure left part) inserts in the circular open portion 38 on the upper right corner be located at fore shell 2 and is outstanding to the front face side (Fig. 4 left side) of fore shell 2, is installed in the fore shell 2 with this state.In addition, the structure of rosette 36 is as follows, roughly forms ring-type by having ornamental sheet metal, and is installed in from the peristome 38 of fore shell 2 periphery to the leading section of the side-prominent support 35 in front, covers the leading section of hiding support 35 thus.
If adopt such cassette video camera, because shutter part 14 is configured in the subject side of the pick-up lens 25 of image unit 13, so shutter part 14 can not be subjected to the restriction of pick-up lens 25 and imaging apparatus 22, therefore can easily design, make shutter part 14, the miniaturization and the slimming of shutter part 14 can be realized thus, the miniaturization and the slimming of video camera integral body can be realized then.Particularly because shutter part 14 is configured in the subject side of pick-up lens 25; so when not photographing, can cover pick-up lens 25 comfortablely by shutter part 14 foldings; therefore can positively protect pick-up lens 25 by shutter part 14, so that pick-up lens 25 is made dirty or injured.
In addition, in this cassette video camera, pick-up lens 25 and imaging apparatus 22 is integrated as image unit 13, this image unit 13 constitutes with shutter part 14 splits, these shutter part 14 splits constitute the subject side that is configured in image unit 13, so the position of only aiming at shutter part 14 with respect to image unit 13 when assembling gets final product, the assembling operation that for this reason can precision well and easily carries out image unit 13 and shutter part 14, productive raising can be realized thus, the goods of low price can be obtained.
In addition, in this cassette video camera, because in the subject side of pick-up lens 25 and at the image planes side configuration fixed aperture 26 of the parts 14 that open the door, so can be at the very near position configuration shutter part 14 of fixed distance aperture 26, it is inhomogeneous to prevent from thus to expose, and, can constitute shutter part 14 so compare with the situation of using movable aperture because aperture is a fixed aperture 26 small-sizedly, also can realize the miniaturization and the slimming of video camera integral body thus.Particularly fixed aperture 26 is formed very thin lamellar of the camera lens thickness of relative pick-up lens 25, snugly fit into state on the pick-up lens 25 with this fixed aperture 26, in pick-up lens 25 is fixed on the installation recess 28 of lens barrel 24, so can make the thickness of fixed aperture 26 extremely thin, the length of optical axis 20 directions is shortened, so can realize the miniaturization and the slimming of image unit 13.
Have again, in this cassette video camera, to have taken in the state of the fast door shell 30 of shutter part 14 in the ornamental portion 34 that is provided with giving prominence to the front of fore shell 2, shutter part 14 is configured in the fore shell 2, so can make the thickness attenuation of the camera body 1 that constitutes by fore shell 2 and back cover 3, can realize the miniaturization and the slimming of video camera integral body thus.In this case; form the support 35 of the inner face side that is configured in fore shell 2 by soft synthetic resin; fast door shell 30 is accommodated in the housing recess 37 of this support 35; so absorb impact so that impact is not applied on the shutter part 14 by this support 35, thereby ornamental portion 34 can be protected shutter part 14.In addition, even the leading section of support 35 is side-prominent to the front from the peristome 38 of fore shell 2, the periphery that is installed in this outstanding support 35 owing to rosette 36 covers the leading section of hiding support 35, so can obtain outward appearance and all desirable goods of design.
And, in the above-described embodiments, although understand the relevant situation that is applied to the cassette video camera, but be not limited to this, for example can pack into and use in portable telephone set and the mobile phone electronic equipments such as (mobile), can be used as minicam in addition and use separately.
(embodiment 2)
Then, with reference to Fig. 6 to Fig. 9 relevant photographic optical system of the present invention is described below.
Pick-up lens of the present invention is characterized in that, by in the photographic optical system of having used imaging apparatuss such as CCD, with the subject side of infrared Absorption filter configuration at pick-up lens, thereby sets back focal length shorter.
Table 1 be depicted as with the existing example of infrared Absorption filter configuration between pick-up lens and imaging apparatus, with the comparison of the total length (TL) of the embodiment that infrared Absorption filter configuration of the present invention is designed in the most close subject side of pick-up lens.Total length TL-16.59mm on the optical axis of existing example, the total length TL=15.76mm of an embodiment.Their poor 0.83mm adopts effect of the present invention, can prove that this miniaturization to pick-up lens has big effect.
In addition, though, be not particularly limited to single-focus lens to using single-focus lens to be illustrated in one embodiment.
Table 1
| The TL of existing example | The TL of one embodiment | TL's is poor |
| ?????16.59mm | ?????15.76mm | ????0.83mm |
Below, by shown in the concrete numerical value about an existing example and an embodiment, additional explanation of the present invention.In table and accompanying drawing, f represents the system-wide focal length of camera lens, F
NoExpression F number, 2 ω represent full field angle, the TL of camera lens represent optical axis from the subject side of the camera lens that is configured in the most close subject side or infrared Absorption light filter distance, the b to image planes
fThe expression back focal length.Back focal length b
fBe from each the picture side of the camera lens of close image planes to the air scaled distance of image planes.In addition, R represent radius-of-curvature, D represent camera lens thickness or camera lens at interval, N
dExpression d curvature of a curve, ν
dAbbe (Abbe) number of expression d line.In addition, the d in the spherical aberration diagram, g, C are the aberration curves of each wavelength, and the S in the spherical aberration diagram represents the sagitta of arc (sagittal), and M represents the summit.
In existing example, between image planes nearest camera lens and image planes, disposing the cover glass CG of optics optical low-pass filter LP, phase-plate PP, infrared Absorption light filter IR, CCD.In one embodiment, disposing infrared Absorption light filter IR, at it and disposing the cover glass CG of optics optical low-pass filter LP, phase-plate PP, CCD between the nearest image planes apart from image planes in the most close subject side.
About the aspheric surface of in an existing example and an embodiment, using, as everyone knows, be the Z axle, when the direction vertical with optical axis is Y-axis, by by aspheric surface formula Z=(Y when establishing optical axis direction
2/ r) [{ 1-(1+K) is (Y/r) for 1+
2]+AY
4+ BY
6+ CY
8+ DY
10+ ... the curved surface that the curved surface that obtains obtains around the optical axis revolution, definition has provided the shape of paraxial radius-of-curvature r, constant of the cone K, high order aspheric surface coefficient A, B, C, D.And, in the mark of the constant of the cone in the table and high order aspheric surface coefficient, " E and the numeral that is right after thereafter " expression " 10 powers ".For example, " E-4 " expression 10
-4, this numerical value acts on the numerical value of tight front.
(existing example) table 2 is depicted as the numerical example of relevant existing example.In addition, Fig. 8 is the structural drawing of this camera lens, and Fig. 9 is its various aberration diagrams.The structure of camera lens is negative camera lens i.e. the 1st camera lens L1, the opening aperture S1 that leaves the airspace and S2, the positive camera lens i.e. the 2nd camera lens L2, i.e. i.e. the 4th camera lens L4, i.e. the 5th camera lens L5 of positive camera lens that leaves the airspace at last a little of the 3rd camera lens L3, positive camera lens of negative camera lens that also leaves the airspace that leave the airspace a little that is disposing the most close subject side.Constitute the 1st camera lens L1 and have disperse function, have the negative focal length type of optically focused effect from the 2nd camera lens L3 to the 5 camera lens L5 at the rear of opening aperture S.
Table 2f=4.39 F
No=2.86 2 ω=65.30 ° TL=16.59 b
f=4.02 No. R D N
dν
d1 11.829 0.60 1.58913 61.25 2 3.448 3.36--
3 4.472 1.21 1.80420 46.50 4-11.322 1.58--5-3.482,0.60 1.84666 23.78 6 7.436 0.17--7,18.657 1.72 1.69350 55.02 8-3.754 0.03--9,11.436 1.40 1.77250 49.62 10-27.132 0.60--11 ∽, 1.97 1.54880 67.00 quartzy OLPF+ phase-plate 12 ∽ 0.50 1.51680 64.20 outer light absorption filter 13 ∽ 0.50--14 ∽ 0.50 1.51680 64.20 CCD cover glass 15 ∽---the 8th K=-0.621461E+01 A=-0.120601E-01 B=0.157434E-02 of asphericity coefficient
C＝-0.139018E-03?????D＝0.836217E-05
[embodiment] table 3 illustrates the numerical example of an embodiment of relevant pick-up lens of the present invention.In addition, Fig. 6 is the structural drawing of this camera lens, and Fig. 7 is its various aberration diagrams.The summary structure of camera lens does not all have to change the most close subject side except that the infrared Absorption filter configuration.
Table 3f=4.40 F
No=2.86 2 ω=65.06 ° TL=15.76 b
f=3.66 No. R D N
dν
d1 ∽, 0.50 1.51680 64.20 infrared Absorption light filter, 2 ∽ 0.50--3 13.613 0.60 1.58913 61.25 4 3.448 2.60--
5 4.214 1.17 1.80420 46.50 6-13.783 1.62--7-3.482,0.60 1.84666 23.78 8 8.746 0.15--9,24.508 1.76 1.69350 55.02 10-3.333 0.03--11,6.615 1.40 1.77250 49.62 12 25.340 0.60--13 ∽, 1.97 1.54880 67.00 quartzy OLPF+ phase-plate 14 ∽ 0.50--CCD cover glasses 15 ∽ 0.50 1.51680 64.20 16 ∽---the 10th K=-0.503401E+01 A=-0.138924E-01 B=0.178560E-02 of asphericity coefficient
C＝-0.179323E-03?????D＝0.147311E-04
As mentioned above, compare, can know that the performance of pick-up lens of the present invention can almost equally with existing example not change, and can reach miniaturization more by data and existing example with an embodiment.
The effect of invention
As above narrate; if employing the present invention; then owing to shutter part is configured in the subject side of pick-up lens; so shutter part is not subjected to the restriction of pick-up lens and imaging apparatus; therefore can easily carry out the designing and making of shutter part; and can realize thus miniaturization and the slimming of shutter part; miniaturization and slimming that thereupon can implement device integral body; and owing to switch when not photographing freely cuts out shutter part and covers pick-up lens; so can really protect pick-up lens by shutter part, in order to pick-up lens is made dirty or injured. Particularly, because the subject side at pick-up lens and the integrated image unit of imaging apparatus, split configuration shutter part, the position of image unit only being aimed at shutter part gets final product, so can precision well and easily carry out the assembling operation of image unit and shutter part, and can realize productive raising thus.
In this case, because in the above-mentioned subject side of above-mentioned pick-up lens and at the image planes side configuration fixed aperture of above-mentioned shutter part, so can be at the utmost point near position configuration shutter part of fixed aperture, it is inhomogeneous to prevent from thus exposing, and because aperture is fixed aperture, compare with the situation of using movable aperture, can consist of shutter part small-sizedly, miniaturization and slimming that thus can implement device integral body.
In addition, by at least a portion at the above-mentioned shutter part of internal configurations that is located at the lip-deep ornamental portion of body housing, the slimming of the body housing of the camera head of can realizing packing into, and can realize thus miniaturization and the slimming of Whole Equipment.
If employing the present invention then can obtain high-performance and small-sized pick-up lens.
Claims (6)
1. a camera head is projected on the imaging apparatus by the picture of pick-up lens with subject, by above-mentioned imaging apparatus the picture that this is projected is taken out as view data, it is characterized in that:
In the subject side of above-mentioned pick-up lens, configuration covers the shutter part of above-mentioned pick-up lens, so that the time shutter during the decision photography.
2. a camera head is projected on the imaging apparatus by the picture of pick-up lens with subject, by above-mentioned imaging apparatus the picture that this is projected is taken out as view data, it is characterized in that:
Make that above-mentioned pick-up lens and above-mentioned imaging apparatus are integrated to constitute image unit, in the subject side of this image unit, configuration covers the shutter part of above-mentioned pick-up lens, so that the time shutter during the decision photography.
3. camera head as claimed in claim 1 or 2 is characterized in that: in the above-mentioned subject side of above-mentioned pick-up lens and at the image planes side of above-mentioned shutter part, configuration fixed aperture.
4. as each described camera head of claim 1 to 3, it is characterized in that: at least a portion of above-mentioned shutter part is configured in the inside that is located at the lip-deep ornamental portion of body housing.
5. pick-up lens, in the photographic optical system of using solid-state imager,
In the subject side of above-mentioned solid-state imager, possess the pick-up lens group that constitutes by a plurality of camera lenses,
By subject side, the back focal length of above-mentioned photographic optical system is shortened with infrared absorption filter configuration above-mentioned camera lens of the most close subject side configuration in above-mentioned pick-up lens group.
6. pick-up lens as claimed in claim 5 is characterized in that: also between above-mentioned solid-state imager and above-mentioned pick-up lens group, dispose the optics optical low-pass filter.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002148656A JP2003344761A (en) | 2002-05-23 | 2002-05-23 | Photographic lens |
| JP2002148656 | 2002-05-23 | ||
| JP2002168275A JP2004015602A (en) | 2002-06-10 | 2002-06-10 | Image pickup device |
| JP2002168275 | 2002-06-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1460889A true CN1460889A (en) | 2003-12-10 |
| CN1327289C CN1327289C (en) | 2007-07-18 |
Family
ID=29714287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031369472A Expired - Fee Related CN1327289C (en) | 2002-05-23 | 2003-05-23 | Camera device and camera lens |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100550406B1 (en) |
| CN (1) | CN1327289C (en) |
| TW (1) | TWI278661B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100531309C (en) * | 2005-12-08 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Image-shooting device and image-shooting system |
| CN103134595A (en) * | 2011-12-05 | 2013-06-05 | 株式会社腾龙 | Infrared camera |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039211B2 (en) * | 1976-03-09 | 1985-09-05 | コニカ株式会社 | camera |
| JPS56159317U (en) * | 1980-04-25 | 1981-11-27 | ||
| JPH03267913A (en) * | 1990-03-19 | 1991-11-28 | Olympus Optical Co Ltd | Image pickup optical system |
| JPH10123418A (en) * | 1996-10-17 | 1998-05-15 | Ricoh Co Ltd | Front diaphragm two-group zoom lens |
| JP2000180914A (en) * | 1998-12-11 | 2000-06-30 | Olympus Optical Co Ltd | Shutter device and electronic camera |
| JP2000270246A (en) * | 1999-03-12 | 2000-09-29 | Sony Corp | Video image pickup device |
| JP2001013542A (en) * | 1999-06-25 | 2001-01-19 | Fuji Photo Film Co Ltd | Camera |
-
2003
- 2003-05-21 KR KR1020030032353A patent/KR100550406B1/en not_active IP Right Cessation
- 2003-05-22 TW TW092113806A patent/TWI278661B/en active
- 2003-05-23 CN CNB031369472A patent/CN1327289C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100531309C (en) * | 2005-12-08 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Image-shooting device and image-shooting system |
| CN103134595A (en) * | 2011-12-05 | 2013-06-05 | 株式会社腾龙 | Infrared camera |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI278661B (en) | 2007-04-11 |
| KR20030091729A (en) | 2003-12-03 |
| KR100550406B1 (en) | 2006-02-09 |
| TW200400368A (en) | 2004-01-01 |
| CN1327289C (en) | 2007-07-18 |
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Granted publication date: 20070718 Termination date: 20170523 |