CN110471172A - A kind of tight shot - Google Patents
A kind of tight shot Download PDFInfo
- Publication number
- CN110471172A CN110471172A CN201910894032.3A CN201910894032A CN110471172A CN 110471172 A CN110471172 A CN 110471172A CN 201910894032 A CN201910894032 A CN 201910894032A CN 110471172 A CN110471172 A CN 110471172A
- Authority
- CN
- China
- Prior art keywords
- lens
- object side
- tight shot
- image side
- focal length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000571 coke Substances 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 20
- 238000001228 spectrum Methods 0.000 claims description 14
- 230000005499 meniscus Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 23
- 238000002329 infrared spectrum Methods 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000009738 saturating Methods 0.000 description 6
- 238000004566 IR spectroscopy Methods 0.000 description 5
- 238000001429 visible spectrum Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
- G02B13/146—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation with corrections for use in multiple wavelength bands, such as infrared and visible light, e.g. FLIR systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of tight shots, including the first lens group (11), the second lens group (12) set gradually by object side to image side；Along object side to image side direction, first lens group (11) includes: the first lens (111) with negative power, the second lens (112) with negative power, the third lens (113) with positive light coke and the 4th lens (114) with positive light coke；Along object side to image side direction, second lens group (12) includes: the 5th lens (121) with negative power, the 6th lens (122) with positive light coke, the 7th lens (123) with negative power, the 8th lens (124) with positive light coke and the 9th lens (125) with positive light coke.Each lens of the present invention meet the collocation of above-mentioned focal power, and then can be realized the tight shot and possess to visible and near infrared spectrum synchronous imaging ability, can possess the rear coke ratio of overlength.
Description
Technical field
The present invention relates to optical field more particularly to a kind of tight shots.
Background technique
The current infrared generally existing such disadvantage of the confocal camera lens of visible light: camera lens pixel is low, high/low temperature is empty burnt, low according to ring
Noise is mostly etc. under border.And the existing confocal camera lens of infrared visible light is that above-mentioned disadvantage is overcome to be needed mostly using several
The higher anomalous dispersion of price and high refractive index material eyeglass realize confocal plane blur-free imaging.This camera lens not only design difficulty
Greatly, development cost is high, and is difficult that infrared visible light is imaged with optimum resolution simultaneously.
Summary of the invention
The purpose of the present invention is to provide a kind of tight shot, solve the problems, such as that image quality is poor.
For achieving the above object, the present invention provides a kind of tight shot, including what is set gradually by object side to image side
First lens group, the second lens group；
Along object side to image side direction, first lens group includes: the first lens with negative power, has negative light focus
Second lens of degree, the third lens with positive light coke and the 4th lens with positive light coke；
Along object side to image side direction, second lens group includes: the 5th lens with negative power, has positive light focus
6th lens of degree, the 7th lens with negative power, the 8th lens with positive light coke and the with positive light coke
Nine lens.
According to an aspect of the present invention, further includes: optical splitter:
Along object side to image side direction, first lens group, second lens group and the optical splitter are set gradually；
The optical splitter is prism spectroscope.
According to an aspect of the present invention, the spacing distance between first lens group and second lens group is
The overall length of Lg, the tight shot are Lt, then meet: 3 < Lg/Lt < 5.
According to an aspect of the present invention, the radius of curvature of the second lens object side is R2a, first lens
Image side curvature radius be R1b, then meet: -2 < R2a/R1b < -1.
According to an aspect of the present invention, the focal length of first lens group is fI, and the focal length of second lens group is
FII then meets: 3 < fI/fII < 11.
According to an aspect of the present invention, the focal length of first lens group is fI, and the focal length of the 4th lens is f4,
Then meet: 3 < fI/f4 < 10.
According to an aspect of the present invention, the focal length of second lens group is fII, and the focal length of the 9th lens is
F9 then meets: 1 < f9/fII < 1.5.
According to an aspect of the present invention, the material of the 5th lens is Nd5 to the refractive index of spectrum d line, described the
The material of six lens is Nd6 to the refractive index of spectrum d line, then meets: 1.1 < (Nd5-1)/(Nd6-1) < 1.8.
According to an aspect of the present invention, the material of the 7th lens is Nd7 to the refractive index of spectrum d line, described the
The material of eight lens is Nd8 to the refractive index of spectrum d line, then meets 1.2 < (Nd7-1)/(Nd8-1) < 1.9.
According to an aspect of the present invention, the third lens are biconvex lens；And/or
5th lens are biconcave lens；And/or
7th lens are meniscus.
According to an aspect of the present invention, further includes: diaphragm: first lens group, described along object side to image side direction
Diaphragm, second lens group are set gradually.
A kind of scheme according to the present invention makes its each lens meet the collocation of above-mentioned focal power, and then it is fixed to can be realized this
Zoom lens possess to visible and near infrared spectrum synchronous imaging ability, can possess the rear coke ratio of overlength.Meanwhile by above-mentioned
It is arranged and tight shot of the invention is enabled to realize temperature compensation function at different ambient temperatures, under large aperture state still
With good resolution, achieve the effect that blur-free imaging.
A kind of scheme according to the present invention, by the spacing distance and tight shot between the first lens group and the second lens group
Overall length proportionate relationship setting within the above range, be further advantageously implemented after the overlength of tight shot of the invention burnt
Than that can be designed for the rear end structure of tight shot of the invention and provide adequate space.
A kind of scheme according to the present invention, so that the curvature on two surfaces opposite between the first lens and the second lens half
The ratio of diameter is within the above range, advantageous to the efficiency of the tight shot convergence light of the invention with raising, and then can be effective
Reduction camera lens front end volume, the injection of external veiling glare can not only be effectively reduced, ensure that image quality, but also can
Manufacturing cost of the invention is effectively reduced.
A kind of scheme according to the present invention, focal power distribution meets above-mentioned item between the first lens group and the second lens group
Part, so that the number of lenses and volume distribution between the group of tight shot of the invention are more reasonable, it is ensured that the fixed-focus mirror
The center of gravity of head is located at rational position.Meanwhile the assembling tolerance for reducing group's part is also helped by above-mentioned setting, to this hair of raising
Bright assembling capacity is advantageous.
A kind of scheme according to the present invention realizes the optimization distribution to lens strength in the first lens group, to make
The overall length that tight shot of the invention reduces the first lens group while guaranteeing larger field angle is obtained, is not only effectively mentioned
The high efficiency of tight shot transmitting light of the invention, also effectively reduces production cost of the invention.
A kind of scheme according to the present invention realizes the optimization distribution to lens strength in the second lens group, to make
Obtaining tight shot of the invention has enough back focal length degree, improves the rear burnt accounting of tight shot of the invention.
A kind of scheme according to the present invention can further promote camera lens by setting biconcave lens for the 5th lens
Two lens groups transmit the efficiency of light, are conducive to correction of second lens group to aberration.
Detailed description of the invention
Fig. 1 schematically shows a kind of structure of the tight shot of embodiment according to the present invention；
Fig. 2 schematically shows the structure chart of tight shot in embodiment one；
Fig. 3 schematically shows the visible spectrum MTF curve of tight shot in embodiment one；
Fig. 4 schematically shows the infrared spectroscopy MTF curve of tight shot in embodiment one；
Fig. 5 schematically shows the structure chart of tight shot in embodiment two；
Fig. 6 schematically shows the visible spectrum MTF curve of tight shot in embodiment two；
Fig. 7 schematically shows the infrared spectroscopy MTF curve of tight shot in embodiment two；
Fig. 8 schematically shows the structure chart of tight shot in embodiment three；
Fig. 9 schematically shows the visible spectrum MTF curve of tight shot in embodiment three；
Figure 10 schematically shows the infrared spectroscopy MTF curve of tight shot in embodiment three；
Figure 11 schematically shows the structure chart of tight shot in example IV；
Figure 12 schematically shows the visible spectrum MTF curve of tight shot in example IV；
Figure 13 schematically shows the infrared spectroscopy MTF curve of tight shot in example IV；
Figure 14 schematically shows the structure chart of tight shot in embodiment five；
Figure 15 schematically shows the visible spectrum MTF curve of tight shot in embodiment five；
Figure 16 schematically shows the infrared spectroscopy MTF curve of tight shot in embodiment five.
Specific embodiment
It, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical solution in the prior art
Needed in attached drawing be briefly described.It should be evident that the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skills without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
" rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", orientation or positional relationship expressed by "outside" are based on phase
Orientation or positional relationship shown in the drawings is closed, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore above-mentioned term cannot
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot go to live in the household of one's in-laws on getting married one by one herein
It states, but therefore embodiments of the present invention are not defined in following implementation.
As shown in Figure 1, a kind of embodiment according to the present invention, a kind of tight shot of the invention, including extremely by object side
The first lens group 11 that image side is set gradually, the second lens group 12.In the present embodiment, along object side to image side direction, first
Lens group 11 includes: the first lens 111 with negative power, and the second lens 112 with negative power have positive light coke
The third lens 113 and the 4th lens 114 with positive light coke；In the present embodiment, along object side to image side direction, second
Lens group 12 includes: the 5th lens 121 with negative power, and the 6th lens 122 with positive light coke have negative power
The 7th lens 123, the 8th lens 124 with positive light coke and the 9th lens 125 with positive light coke.It is set by above-mentioned
The tight shot set makes its each lens meet the collocation of above-mentioned focal power, and then can be realized the tight shot and possess to visible
With the ability of near infrared spectrum synchronous imaging, the rear coke ratio of overlength can be possessed.Meanwhile this hair is enabled to by above-mentioned setting
Bright tight shot realizes temperature compensation function at different ambient temperatures, still has good parsing under large aperture state
Degree, achievees the effect that blur-free imaging.
As shown in Figure 1, a kind of embodiment according to the present invention, between the first lens group 11 and the second lens group 12 between
For gauge from for Lg, the overall length of tight shot is Lt, then meets: 3 < Lg/Lt < 5.In the present embodiment, the first lens group 11
Spacing distance Lg between the second lens group 12 refers to that the 4th lens 114 image side vertex of surface to the 5th lens, 121 object side is pushed up
The distance between point.The overall length Lt of tight shot refers to the imaging of 111 object side peak of the first lens to the first imaging sensor A
The distance between vertex of surface.By above-mentioned setting, by the spacing distance between the first lens group 11 and the second lens group 12 and determine
The proportionate relationship setting of the overall length of zoom lens within the above range, is further advantageously implemented the overlength of tight shot of the invention
Coke ratio afterwards can design for the rear end structure of tight shot of the invention and provide adequate space.
As shown in Figure 1, a kind of embodiment according to the present invention, the radius of curvature of 112 object side of the second lens be
The image side curvature radius of R2a, the first lens 111 are R1b, then meet: -2 < R2a/R1b < -1.By above-mentioned upper setting, make
The radius of curvature on two surfaces opposite between the first lens and the second lens ratio within the above range, to improve this
The efficiency of the tight shot convergence light of invention is advantageous, and then can effectively reduce the volume of camera lens front end, can not only have
Effect reduces the injection of external veiling glare, ensure that image quality, but also can be effectively reduced manufacturing cost of the invention.
As shown in Figure 1, a kind of embodiment according to the present invention, the focal length of the first lens group 11 is fI, the second lens group
12 focal length is fII, then meets: 3 < fI/fII < 11.By above-mentioned setting, light between the first lens group and the second lens group
Focal power distribution meets above-mentioned condition, so that the number of lenses and volume between the group of tight shot of the invention are distributed more adduction
Reason, it is ensured that the center of gravity of the tight shot is located at rational position.Meanwhile the group for reducing group's part is also helped by above-mentioned setting
Tolerance is filled, it is advantageous to the assembling capacity for improving of the invention.
As shown in Figure 1, a kind of embodiment according to the present invention, the focal length of the first lens group 11 is fI, the 4th lens 114
Focal length be f4, then meet: 3 < fI/f4 < 10.By above-mentioned setting, realize to lens strength in the first lens group
Optimization distribution, so that tight shot of the invention reduces the totality of the first lens group while guaranteeing larger field angle
Length not only effectively increases the efficiency of tight shot transmitting light of the invention, also effectively reduces of the invention be produced into
This.
As shown in Figure 1, a kind of embodiment according to the present invention, the focal length of the second lens group 12 is fII, the 9th lens
125 focal length is f9, then meets: 1 < f9/fII < 1.5.By above-mentioned setting, realize to lens light focus in the second lens group
The optimization of degree distributes, so that tight shot of the invention has enough back focal length degree, improves fixed-focus mirror of the invention
The rear burnt accounting of head.
As shown in Figure 1, a kind of embodiment according to the present invention, the refractive index of the materials of the 5th lens 121 to spectrum d line
For Nd5, the material of the 6th lens 122 is Nd6 to the refractive index of spectrum d line, then meets: 1.1 < (Nd5-1)/(Nd6-1) <
1.8.It should be pointed out that spectrum d line refers to the green light in spectrum.By above-mentioned setting, to the 5th lens and the 6th lens
Material optimizes collocation, to effectively correct the color difference of tight shot in the present invention, and is advantageously implemented camera lens
Temperature compensation function, so it is advantageous to image quality of the invention is improved.
As shown in Figure 1, a kind of embodiment according to the present invention, the refractive index of the materials of the 7th lens 123 to spectrum d line
For Nd7, the material of the 8th lens 124 is Nd8 to the refractive index of spectrum d line, then meets 1.2 < (Nd7-1)/(Nd8-1) <
1.9.By above-mentioned setting, collocation is optimized to the material of the 7th lens and the 8th lens, can further correct the present invention
Color difference, allow the invention to visible and near infrared spectrum can blur-free imaging, improve image quality of the invention.
As shown in Figure 1, a kind of embodiment according to the present invention, the third lens 113 are biconvex lens.It is set by above-mentioned
It sets, while sufficient positive light coke can be provided for the first lens group, the second lens of collocation can effectively correct the first lens
The color difference of group is conducive to improve image quality.
As shown in Figure 1, a kind of embodiment according to the present invention, the 5th lens 121 are biconcave lens.By saturating by the 5th
Mirror, which is set as biconcave lens, can further promote the efficiency of the second lens group of camera lens transmitting light, be conducive to the second lens group pair
The correction of aberration.
As shown in Figure 1, a kind of embodiment according to the present invention, the 7th lens 123 are meniscus.It is set by above-mentioned
It sets, the 7th lens small volume of this shape, will not excessively occupy lens space, collocation the 8th while reducing camera lens volume
Lens can effectively correct the color difference of the second lens group, be conducive to improve image quality.
As shown in Figure 1, a kind of embodiment according to the present invention, tight shot of the invention further include: diaphragm 13.At this
In embodiment, along object side to image side direction, the first lens group 11, diaphragm 13, the second lens group 12 are set gradually, i.e. diaphragm 13
Between the first lens group 11 and the second lens group 12.
As shown in Fig. 2, a kind of embodiment according to the present invention, tight shot of the invention further include: optical splitter 14.In
In present embodiment, along object side to image side direction, the first lens group 11, the second lens group 12 and optical splitter 14 are set gradually, i.e.,
Optical splitter 14 is located at the object side of the second lens group 12.In the present embodiment, optical splitter 14 is prism spectroscope.In this embodiment party
In formula mode, when due to then absorbing image using tight shot of the invention using optical splitter 14, can be arranged accordingly two at
As sensor, i.e. the first imaging sensor A and the second imaging sensor B.The image of sensors A and B are subjected to synthesis processing again,
It can synchronize to obtain the image of wide spectral range.When for the imaging of visible and near infrared spectrum, above-mentioned imaging is adjusted accordingly
Sensor.
For the more detailed description present invention, of the invention is illustrated.
Foregoing teachings according to the present invention, the numerical value for meeting the embodiment of aforementioned formula to tight shot of the invention carry out
Summarize, such as the following table 1:
Embodiment one:
Structure based on tight shot shown in Fig. 2 is illustrated the present embodiment.It is shown in Figure 2, for convenience of description
The embodiment of the present invention is then numbered by mirror surface of the object side to image side to the lens of tight shot of the invention.Therefore.S1 is
For first lens 111 close to the object side of object side, S2 is image side surface of first lens 111 close to image side；S3 is that the second lens 112 lean on
The object side of nearly object side, S4 are the cemented surface of the second lens 112 and the third lens 113, and S5 is the third lens 113 close to image side
Image side surface；S6 is the 4th lens 114 close to the object side of object side, and S7 is image side surface of the 4th lens 114 close to image side；S8 is light
Door screen；S9 is the 5th lens 121 close to the object side of object side, and S10 is the cemented surface of the 5th lens 121 and the 6th lens 122, S11
It is the 6th lens 122 close to the image side surface of image side；S12 is the 7th lens 123 close to the object side of object side, and S13 is the 7th lens
123 and the 8th lens 124 cemented surface, S14 be the 8th lens 124 close to image side image side surface；S15 is that the 9th lens 125 lean on
The object side of nearly object side, S16 are image side surface of the 9th lens 125 close to image side；S17 is optical splitter 14 and 125 phase of the 9th lens
Adjacent side, S18 are the side adjacent with the first imaging sensor A of optical splitter 14, and S19 is that optical splitter 14 and the second imaging sense
Device B adjacent side.
It should be pointed out that the combined focal length of the first lens group 11 is fI, the combined focal length of the second lens group 12 is fII,
The focal length of first lens 111 is f1, and the focal length of the second lens 112 is f2, and the focal length of the third lens 113 is f3, the 4th lens 114
Focal length be f4, the combined focal length of the 5th lens 121 and the 6th lens 122 is f56, the 7th lens 123 and the 8th lens 124
Combined focal length is f78, and the focal length of the 9th lens 125 is f9, and each parameter of tight shot of the present invention is as described below:
FI=121.159, fII=33.155；
F1=-32.638, f2=-13.455, f3=26.737, f4=35.589, f56=-81.431, f78=
84.019 f9=38.904；
Lg=27.67, Lt=110.00；
System parameter are as follows: focal length 16.5mm, 54.8 ° of field angle, overall length 110.0mm.
Following table 2 lists the relevant parameter of each lens in the present embodiment, including surface type, radius of curvature, thickness, material
Refractive index and lens Abbe number Vd, wherein Infinity is indicated infinitely great:
Table 2
It can be seen that according to Fig. 3 and Fig. 4, tight shot of the invention is not less than in the low frequency mtf value of visible waveband
80%, intermediate frequency mtf value is not less than 60%, and high frequency mtf value is not less than 40%；The low frequency mtf value of infrared band is not less than 70%, in
Frequency mtf value is not less than 50%, and high-resolution of the high frequency mtf value not less than 40% shows.And then it is found that fixed-focus mirror in the present embodiment
The every aberration of head can be satisfactorily corrected, have good temperature performance and low distortion performance, therefore, tight shot of the invention
With good optical property.
Embodiment two:
Structure based on tight shot shown in fig. 5 is illustrated the present embodiment.It is shown in Figure 5, for convenience of description
The embodiment of the present invention is then numbered by mirror surface of the object side to image side to the lens of tight shot of the invention.Therefore.S1 is
For first lens 111 close to the object side of object side, S2 is image side surface of first lens 111 close to image side；S3 is that the second lens 112 lean on
The object side of nearly object side, S4 are image side surface of second lens 112 close to image side；S5 is object side of the third lens 113 close to object side
Face, S6 are image side surface of the third lens 113 close to image side；S7 is the 4th lens 114 close to the object side of object side, and S8 is the 4th saturating
Image side surface of the mirror 114 close to image side；S9 is diaphragm；S10 is the 5th lens 121 close to the object side of object side, and S11 is the 5th lens
121 close to image side image side surface；S12 is object side of the 6th lens 122 close to object side；S13 is the 6th lens 122 close to image side
Image side surface；S14 is the 7th lens 123 close to the object side of object side, and S15 is the gluing of the 7th lens 123 and the 8th lens 124
Face；S16 is image side surface of the 8th lens 124 close to image side；S17 is the 9th lens 125 close to the object side of object side, S18 the
Image side surface of nine lens 125 close to image side；S19 is the side adjacent with the 9th lens 125 of optical splitter 14, and S20 is optical splitter 14
The side adjacent with the first imaging sensor A, S21 are the side adjacent with the second imaging sensor B of optical splitter 14.
It should be pointed out that the combined focal length of the first lens group 11 is fI, the combined focal length of the second lens group 12 is fII,
The focal length of first lens 111 is f1, and the focal length of the second lens 112 is f2, and the focal length of the third lens 113 is f3, the 4th lens 114
Focal length be f4, the combined focal length of the 5th lens 121 and the 6th lens 122 is f56, the 7th lens 123 and the 8th lens 124
Combined focal length is f78, and the focal length of the 9th lens 125 is f9, and each parameter of tight shot of the present invention is as described below:
FI=191.288, fII=31.353；
F1=-35.384, f2=-14.681, f3=31.116, f4=37.997, f56=-310.714, f78=
857.469, f9=33.412；
Lg=25.65, Lt=107.50；
System parameter are as follows: focal length 15.6mm, 50.4 ° of field angle, overall length 107.5mm.
Following table 3 lists the relevant parameter of each lens in the present embodiment, including surface type, radius of curvature, thickness, material
Refractive index and lens Abbe number Vd, wherein Infinity is indicated infinitely great:
Table 3
It can be seen that according to Fig. 6 and Fig. 7, tight shot of the invention is not less than in the low frequency mtf value of visible waveband
80%, intermediate frequency mtf value is not less than 60%, and high frequency mtf value is not less than 40%；It is not less than 70% in the low frequency mtf value of infrared band,
Intermediate frequency mtf value is not less than 60%, and high-resolution of the high frequency mtf value not less than 40% shows.And then it is found that fixed-focus in the present embodiment
Camera lens items aberration can be satisfactorily corrected, have good temperature performance and low distortion performance, therefore, fixed-focus mirror of the invention
Head has good optical property.
Embodiment three:
Structure based on tight shot shown in Fig. 8 is illustrated the present embodiment.It is shown in Figure 8, for convenience of description
The embodiment of the present invention is then numbered by mirror surface of the object side to image side to the lens of tight shot of the invention.Therefore.S1 is
For first lens 111 close to the object side of object side, S2 is image side surface of first lens 111 close to image side；S3 is that the second lens 112 lean on
The object side of nearly object side, S4 are the cemented surface of the second lens 112 and the third lens 113, and S5 is the third lens 113 close to image side
Image side surface；S6 is the 4th lens 114 close to the object side of object side, and S7 is image side surface of the 4th lens 114 close to image side；S8 is light
Door screen；S9 is the 5th lens 121 close to the object side of object side, and S10 is image side surface of the 5th lens 121 close to image side；S11 is the 6th
Object side of the lens 122 close to object side；S12 is image side surface of the 6th lens 122 close to image side；S13 is that the 7th lens 123 are close
The object side of object side, S14 are image side surface of the 7th lens 123 close to image side；S15 is object side of the 8th lens 124 close to object side
Face；S16 is image side surface of the 8th lens 124 close to image side；S17 is the 9th lens 125 close to the object side of object side, S18 the
Image side surface of nine lens 125 close to image side；S19 is the side adjacent with the 9th lens 125 of optical splitter 14, and S20 is optical splitter 14
The side adjacent with the first imaging sensor A, S21 are the side adjacent with the second imaging sensor B of optical splitter 14.
It should be pointed out that the combined focal length of the first lens group 11 is fI, the combined focal length of the second lens group 12 is fII,
The focal length of first lens 111 is f1, and the focal length of the second lens 112 is f2, and the focal length of the third lens 113 is f3, the 4th lens 114
Focal length be f4, the combined focal length of the 5th lens 121 and the 6th lens 122 is f56, the 7th lens 123 and the 8th lens 124
Combined focal length is f78, and the focal length of the 9th lens 125 is f9, and each parameter of tight shot of the present invention is as described below:
FI=328.835, fII=31.138
F1=-30.538, f2=-12.440, f3=25.019, f4=34.752, f56=-134.365, f78=
112.510, f9=38.401；
Lg=25.26, Lt=108.00；
System parameter are as follows: focal length 15.0mm, 58.3 ° of field angle, overall length 108.0mm.
Following table 4 lists the relevant parameter of each lens in the present embodiment, including surface type, radius of curvature, thickness, material
Refractive index and lens Abbe number Vd, wherein Infinity is indicated infinitely great:
| Face number | Surface type | Radius of curvature | Thickness | Refractive index | Abbe number |
| S1 | Spherical surface | 256.719 | 1.30 | 1.54 | 72.5 |
| S2 | Spherical surface | 15.572 | 6.36 | ||
| S3 | Spherical surface | -18.962 | 6.80 | 1.91 | 33.0 |
| S4 | Spherical surface | 33.879 | 7.64 | 1.63 | 55.6 |
| S5 | Spherical surface | -27.200 | 0.34 | ||
| S6 | Spherical surface | 53.434 | 4.10 | 1.85 | 23.8 |
| S7 | Spherical surface | -64.566 | 21.14 | ||
| S8 | Spherical surface | Infinity | 4.12 | ||
| S9 | Spherical surface | -44.110 | 1.00 | 1.89 | 28.6 |
| S10 | Spherical surface | 42.828 | 0.30 | ||
| S11 | Spherical surface | 40.167 | 4.82 | 1.65 | 61.6 |
| S12 | Spherical surface | -41.464 | 0.15 | ||
| S13 | Spherical surface | 66.753 | 1.00 | 1.89 | 38.3 |
| S14 | Spherical surface | 27.382 | 0.24 | ||
| S15 | Spherical surface | 28.731 | 5.45 | 1.50 | 81.6 |
| S16 | Spherical surface | -46.628 | 0.15 | ||
| S17 | Spherical surface | 34.561 | 4.08 | 1.76 | 53.5 |
| S18 | Spherical surface | -186.632 | 17.20 | ||
| S19 | Spherical surface | Infinity | 20.80 | 1.52 | 64.2 |
| S20 | Spherical surface | Infinity | 1.00 | ||
| S21 | Spherical surface | Infinity | 1.10 |
Table 4
It can be seen that according to Fig. 9 and Figure 10, tight shot of the invention is not less than in the low frequency mtf value of visible waveband
80%, intermediate frequency mtf value is not less than 60%, and high frequency mtf value is not less than 40%；It is not less than 70% in the low frequency mtf value of infrared band,
Intermediate frequency mtf value is not less than 50%, and high-resolution of the high frequency mtf value not less than 40% shows.And then it is found that fixed-focus in the present embodiment
Camera lens items aberration can be satisfactorily corrected, have good temperature performance and low distortion performance, therefore, fixed-focus mirror of the invention
Head has good optical property.
Example IV:
Structure based on tight shot shown in Figure 11 is illustrated the present embodiment.It is shown in Figure 11, for convenience of saying
Bright the embodiment of the present invention is then numbered by mirror surface of the object side to image side to the lens of tight shot of the invention.Therefore.S1
It is the first lens 111 close to the object side of object side, S2 is image side surface of first lens 111 close to image side；S3 is the second lens 112
Close to the object side of object side；S4 is image side surface of second lens 112 close to image side；Object side of the S5 the third lens 113 close to object side
Face；S6 is image side surface of the third lens 113 close to image side；S7 is the 4th lens 114 close to the object side of object side, and S8 is the 4th saturating
Image side surface of the mirror 114 close to image side；S9 is diaphragm；S10 is the 5th lens 121 close to the object side of object side, and S11 is the 5th lens
121 and the 6th lens 122 cemented surface；S12 is image side surface of the 6th lens 122 close to image side；S13 is that the 7th lens 123 lean on
The object side of nearly object side；S14 is image side surface of the 7th lens 123 close to image side；S15 is object of the 8th lens 124 close to object side
Side；S16 is image side surface of the 8th lens 124 close to image side；S17 is the 9th lens 125 close to the object side of object side, and S18 is
Image side surface of 9th lens 125 close to image side；S19 is the side adjacent with the 9th lens 125 of optical splitter 14, and S20 is optical splitter
14 sides adjacent with the first imaging sensor A, S21 are the side adjacent with the second imaging sensor B of optical splitter 14.
It should be pointed out that the combined focal length of the first lens group 11 is fI, the combined focal length of the second lens group 12 is fII,
The focal length of first lens 111 is f1, and the focal length of the second lens 112 is f2, and the focal length of the third lens 113 is f3, the 4th lens 114
Focal length be f4, the combined focal length of the 5th lens 121 and the 6th lens 122 is f56, the 7th lens 123 and the 8th lens 124
Combined focal length is f78, and the focal length of the 9th lens 125 is f9, and each parameter of tight shot of the present invention is as described below:
FI=343.999, fII=32.446；
F1=-36.960, f2=-13.966, f3=32.710, f4=38.917, f56=-628.564, f78=
147.230, f9=42.846；
Lg=24.93, Lt=109.00；
System parameter are as follows: focal length 14.8mm, 48.0 ° of field angle, overall length 109.0mm.
Following table 5 lists the relevant parameter of each lens in the present embodiment, including surface type, radius of curvature, thickness, material
Refractive index and lens Abbe number Vd, wherein Infinity is indicated infinitely great:
Table 5
It can be seen that according to Figure 12 and Figure 13, tight shot of the invention is not less than in the low frequency mtf value of visible waveband
85%, intermediate frequency mtf value is not less than 65%, and high frequency mtf value is not less than 50%；It is not less than 75% in the low frequency mtf value of infrared band,
Intermediate frequency mtf value is not less than 60%, and high-resolution of the high frequency mtf value not less than 50% shows.And then it is found that fixed-focus in the present embodiment
Camera lens items aberration can be satisfactorily corrected, have good temperature performance and low distortion performance, therefore, fixed-focus mirror of the invention
Head has good optical property.
Embodiment five:
Structure based on tight shot shown in Figure 14 is illustrated the present embodiment.It is shown in Figure 14, for convenience of saying
Bright the embodiment of the present invention is then numbered by mirror surface of the object side to image side to the lens of tight shot of the invention.Therefore.S1
It is the first lens 111 close to the object side of object side, S2 is image side surface of first lens 111 close to image side；S3 is the second lens 112
Close to the object side of object side；S4 is image side surface of second lens 112 close to image side；Object side of the S5 the third lens 113 close to object side
Face；S6 is image side surface of the third lens 113 close to image side；S7 is the 4th lens 114 close to the object side of object side, and S8 is the 4th saturating
Image side surface of the mirror 114 close to image side；S9 is diaphragm；S10 is object side of the 5th lens 121 close to object side；S11 is the 5th lens
121 close to image side image side surface；S12 is object side of the 6th lens 122 close to object side；S13 is the 6th lens 122 close to image side
Image side surface；S14 is object side of the 7th lens 123 close to object side；S15 is image side surface of the 7th lens 123 close to image side；
S16 is object side of the 8th lens 124 close to object side；S17 is image side surface of the 8th lens 124 close to image side；S18 is the 9th saturating
For mirror 125 close to the object side of object side, S19 is image side surface of the 9th lens 125 close to image side；S20 is that optical splitter 14 and the 9th are saturating
The adjacent side of mirror 125, S21 are the side adjacent with the first imaging sensor A of optical splitter 14, and S22 is optical splitter 14 and second
Imaging sensor B adjacent side.
It should be pointed out that the combined focal length of the first lens group 11 is fI, the combined focal length of the second lens group 12 is fII,
The focal length of first lens 111 is f1, and the focal length of the second lens 112 is f2, and the focal length of the third lens 113 is f3, the 4th lens 114
Focal length be f4, the combined focal length of the 5th lens 121 and the 6th lens 122 is f56, the 7th lens 123 and the 8th lens 124
Combined focal length is f78, and the focal length of the 9th lens 125 is f9, and each parameter of tight shot of the present invention is as described below:
FI=240.189, fII=30.933；
F1=-38.385, f2=-13.375, f3=31.684, f4=37.826, f56=-244.283, f78=
342.569, f9=34.007；
Lg=22.61, Lt=108.00；
System parameter are as follows: focal length 14.0mm, 51.0 ° of field angle, overall length 108.0mm.
Following table 6 lists the relevant parameter of each lens in the present embodiment, including surface type, radius of curvature, thickness, material
Refractive index and lens Abbe number Vd, wherein Infinity is indicated infinitely great:
Table 6
It can be seen that according to Figure 12 and Figure 13, tight shot of the invention is not less than in the low frequency mtf value of visible waveband
85%, intermediate frequency mtf value is not less than 60%, and high frequency mtf value is not less than 45%；It is not less than 70% in the low frequency mtf value of infrared band,
Intermediate frequency mtf value is not less than 60%, and high-resolution of the high frequency mtf value not less than 45% shows.And then it is found that fixed-focus in the present embodiment
Camera lens items aberration can be satisfactorily corrected, have good temperature performance and low distortion performance, therefore, fixed-focus mirror of the invention
Head has good optical property.
Above content is only the example of concrete scheme of the invention, for the equipment and structure of wherein not detailed description, is answered
When being interpreted as that the existing common apparatus in this field and universal method is taken to be practiced.
The foregoing is merely a schemes of the invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of tight shot, which is characterized in that including set gradually by object side to image side the first lens group (11), second thoroughly
Microscope group (12)；
Along object side to image side direction, first lens group (11) includes: the first lens (111) with negative power, is had
The second lens (112) of negative power, the third lens (113) with positive light coke and the 4th lens with positive light coke
(114)；
Along object side to image side direction, second lens group (12) includes: the 5th lens (121) with negative power, is had
6th lens (122) of positive light coke, the 7th lens (123) with negative power, the 8th lens with positive light coke
(124) the 9th lens (125) and with positive light coke.
2. tight shot according to claim 1, which is characterized in that further include: optical splitter (14):
Along object side to image side direction, first lens group (11), second lens group (12) and the optical splitter (14) according to
Secondary setting；
The optical splitter (14) is prism spectroscope.
3. tight shot according to claim 2, which is characterized in that first lens group (11) and second lens
Spacing distance between group (12) is Lg, and the overall length of the tight shot is Lt, then meets: 3 < Lg/Lt < 5.
4. tight shot according to claim 3, which is characterized in that the curvature of described the second lens (112) the object side
Radius is R2a, and the image side curvature radius of first lens (111) is R1b, then meets: -2 < R2a/R1b < -1.
5. tight shot according to claim 4, which is characterized in that the focal length of first lens group (11) is fI, institute
The focal length for stating the second lens group (12) is fII, then meets: 3 < fI/fII < 11.
6. tight shot according to claim 4, which is characterized in that the focal length of first lens group (11) is fI, institute
The focal length for stating the 4th lens (114) is f4, then meets: 3 < fI/f4 < 10.
7. tight shot according to claim 4, which is characterized in that the focal length of second lens group (12) is fII, institute
The focal length for stating the 9th lens (125) is f9, then meets: 1 < f9/fII < 1.5.
8. tight shot according to any one of claims 1 to 7, which is characterized in that the material of the 5th lens (121)
Refractive index to spectrum d line is Nd5, and the material of the 6th lens (122) is Nd6 to the refractive index of spectrum d line, then meets:
1.1 < (Nd5-1)/(Nd6-1) < 1.8.
9. tight shot according to claim 8, which is characterized in that the material of the 7th lens (123) is to spectrum d line
Refractive index be Nd7, the materials of the 8th lens (124) is Nd8 to the refractive index of spectrum d line, then meets 1.2 < (Nd7-
1)/(Nd8-1) < 1.9.
10. according to claim 1 to 7,9 described in any item tight shots, which is characterized in that the third lens (113) are
Biconvex lens；And/or
5th lens (121) are biconcave lens；And/or
7th lens (123) are meniscus.
11. tight shot according to claim 1, which is characterized in that further include: diaphragm (13): along object side to image side side
To first lens group (11), the diaphragm (13), second lens group (12) are set gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894032.3A CN110471172A (en) | 2019-09-20 | 2019-09-20 | A kind of tight shot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894032.3A CN110471172A (en) | 2019-09-20 | 2019-09-20 | A kind of tight shot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110471172A true CN110471172A (en) | 2019-11-19 |
Family
ID=68516389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910894032.3A Pending CN110471172A (en) | 2019-09-20 | 2019-09-20 | A kind of tight shot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110471172A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111657823A (en) * | 2020-04-30 | 2020-09-15 | 北京航空航天大学 | Wide-spectrum endoscope imaging adapter |
| CN111781708A (en) * | 2020-08-20 | 2020-10-16 | 东莞市长益光电有限公司 | Fixed focus lens for realizing full-color photography under low illumination |
| CN116449542A (en) * | 2023-06-15 | 2023-07-18 | 武汉大学 | Large-view-field high-precision ultraviolet imaging lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101365A (en) * | 2006-06-22 | 2008-01-09 | Bci财务公司 | Projection objective with fixed focal length for digital projection |
| CN102236159A (en) * | 2010-04-28 | 2011-11-09 | 富士胶片株式会社 | Zoom lens for projection and projection-type display apparatus |
| CN210348047U (en) * | 2019-09-20 | 2020-04-17 | 舜宇光学(中山)有限公司 | Fixed focus lens |
-
2019
- 2019-09-20 CN CN201910894032.3A patent/CN110471172A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101365A (en) * | 2006-06-22 | 2008-01-09 | Bci财务公司 | Projection objective with fixed focal length for digital projection |
| CN102236159A (en) * | 2010-04-28 | 2011-11-09 | 富士胶片株式会社 | Zoom lens for projection and projection-type display apparatus |
| CN210348047U (en) * | 2019-09-20 | 2020-04-17 | 舜宇光学(中山)有限公司 | Fixed focus lens |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111657823A (en) * | 2020-04-30 | 2020-09-15 | 北京航空航天大学 | Wide-spectrum endoscope imaging adapter |
| CN111657823B (en) * | 2020-04-30 | 2021-08-03 | 北京航空航天大学 | Wide-spectrum endoscope imaging adapter |
| CN111781708A (en) * | 2020-08-20 | 2020-10-16 | 东莞市长益光电有限公司 | Fixed focus lens for realizing full-color photography under low illumination |
| CN116449542A (en) * | 2023-06-15 | 2023-07-18 | 武汉大学 | Large-view-field high-precision ultraviolet imaging lens |
| CN116449542B (en) * | 2023-06-15 | 2023-09-15 | 武汉大学 | Large-view-field high-precision ultraviolet imaging lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11841549B2 (en) | Wide-angle lens | |
| US11846757B2 (en) | Optical imaging lens assembly | |
| CN105182507B (en) | A kind of wide-angle tight shot | |
| US11789238B2 (en) | Electronic imaging apparatus including seven lenses of +−+++−−, +−−+−+−, +−+−++−, +−++++−, −++−+− −, +++−++−, −++−++− or +++−+−− refractive powers | |
| CN107102422A (en) | A kind of large aperture ultra-wide angle ultra high-definition zoom lens | |
| US8755131B2 (en) | Optical lens assembly for capturing images and image capture device therewith | |
| CN110471172A (en) | A kind of tight shot | |
| CN106772946A (en) | Small-sized glass modeling mixing is without thermalization tight shot | |
| US11543634B2 (en) | Optical imaging lens group | |
| CN104865679A (en) | Imaging lens | |
| CN107957622A (en) | A kind of focal length zoom lens of the big image planes of large aperture | |
| CN109116532A (en) | Zoom lens | |
| CN103424846A (en) | Optical lens set for camera shooting and camera shooting device thereof | |
| CN103913814B (en) | Image capture unit and transfer lens thereof | |
| CN207020389U (en) | A kind of zoom-lens system and zoom lens | |
| CN106094183B (en) | Focusing-style optical imaging system in a kind of high image quality | |
| CN217767015U (en) | Zoom lens | |
| CN108333724B (en) | Fixed focus lens | |
| CN108363190B (en) | Lens system and lens | |
| CN212364702U (en) | Wide-angle lens with large image surface | |
| CN206331171U (en) | A kind of lens combination and tight shot | |
| CN210348047U (en) | Fixed focus lens | |
| CN210199392U (en) | Wide-angle lens | |
| CN108983402A (en) | Large aperture camera lens | |
| CN213544935U (en) | Confocal optical imaging camera lens of high definition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |