CN104280868A - Microscope objective lens - Google Patents
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- CN104280868A CN104280868A CN201410598257.1A CN201410598257A CN104280868A CN 104280868 A CN104280868 A CN 104280868A CN 201410598257 A CN201410598257 A CN 201410598257A CN 104280868 A CN104280868 A CN 104280868A
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Abstract
The invention discloses a microscope objective lens and belongs to the field of optics. The microscope objective lens comprises eight spherical glass lenses with the same optical axis. The eight spherical glass lenses are sequentially arranged from the object space to the image space, a concave face of the first lens faces the object space and a convex face of the first lens faces the image space; a bonding lens set is formed by the second lens and the third lens, a bonding lens set is formed by the fourth lens and the fifth lens, a convex face of the sixth lens faces the object space, and a bonding lens set is formed by the seventh lens and the eighth lens. High-resolution imaging can be achieved and the microscope objective lens has the advantages of being large in view field, high in resolution, small in size, mature in processing technology, low in cost and the like.
Description
Technical field
The invention belongs to optical field, more particularly, relate to a kind of micro objective.
Background technology
Microscope has become the requisite high technology equipment of a lot of industry research, in some accurate miniature field widespread uses, has irreplaceable effect especially in medical treatment and scientific research etc.
The size of the visual field of micro objective can affect range of observation, and visual field is larger, and observable scope is larger, object observing that like this can be better and complete; Have all kinds of micro objective in the world at present, but the visual field that technically can reach at present generally remains on about 20mm, and maximum visual field also only has 25mm, and be all only applicable to visualization aspect; Along with the development of science and technology, a lot of field has started the technology applying ccd image collection aspect automatically at present, therefore need the visual field of larger micro objective, and the visual field of the micro objective of routine cannot satisfy the demands.
China Patent No.: 200810087210.3, the applying date: on 03 24th, 2008, disclose the patent that a name is called a kind of micro objective, it is by least four lens or lens combination (L
1, L
2A, L
2B, L
3, L
4A, L
4B, G
1, G
2) form and can preferably be used to improve picture contrast.According to this invention, observe from object side, the first lens and the second lens (L can be integrated into by with the concentrically aligned outside phase-plate of optical axis
2Aor L
2B) between air space in and take out from this air space.Arrange phase-plate with limiting and explicitly actual pupil be displaced to the first two lens (L of micro objective
1and L
2A, L
2B) or lens combination between air space in allow the micro objective being designed to bright field modification to be at first redesigned as relatively simple phase contrast modification, but its visual field is still less, and manufacturing cost is high.
China Patent No.: 200780016306.4, the applying date: on 04 26th, 2007, disclose the patent document that a name is called a kind of micro objective, it has preferred antisymmetric lens or lens combination, and imaging scale is-100 times, and visual field value is 20.According to this invention, this micro objective is made up of 9 lens and 3 attaching components, the lens formed by an approximate half-sphere mirror L1 with positive light coke from object side (left side), the concave-convex lens L2 with positive light coke, have positive light coke double attaching components G1, there is another double attaching components G2 of positive light coke, there is the double attaching components G3 of negative power, be finally the concave-convex lens L9 with negative power.By adopting the attaching components and lens pair that structure is identical, picture contrast can be improved.But it is high to there is production cost in it, processing difficulties.
Summary of the invention
1. the problem that will solve
Visual field for existing micro objective is little, and the problem that the visual field of the micro objective of routine cannot satisfy the demands and cost is high, the invention provides a kind of micro objective, it has the advantage that visual field is large, resolution is high, volume is little, processing technology is easy to operate and cost is low.
2. technical scheme
In order to solve the problem, the technical solution adopted in the present invention is as follows:
A kind of micro objective, comprise eight spherical lenses of shaft device of sharing the same light, be arranged in order from object space to image space, be respectively from object space to eight of image space spherical lenses: the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens, wherein the first lens face is concave surface to object space, is convex surface towards image space, second lens and the 3rd lens combination become balsaming lens group, and wherein the second lens face is plane to object space, are concave surface towards image space, 3rd lens face is convex surface to object space, is convex surface towards image space, the second lens face to the concave surface of image space and the 3rd lens face glued together to the convex surface of object space, 4th lens and the 5th lens combination become balsaming lens group, and wherein the 4th lens face is convex surface to object space, are convex surface towards image space, 5th lens face is concave surface to object space, is convex surface towards image space, and the 4th lens face is combined to the convex surface of image space and the 5th lens face to the concave glue of object space, 6th lens face is convex surface to object space, is concave surface towards image space, 7th lens and the 8th lens combination become balsaming lens group, and wherein the 7th lens face is concave surface to object space, are convex surface towards image space, 8th lens face is concave surface to object space, is concave surface towards image space, and the 7th lens face is combined to the convex surface of image space and the 8th lens face to the concave glue of object space, above-mentioned eight lens have 13 minute surfaces, the concave surface of the first lens is the first minute surface, the convex surface of the first lens is the second minute surface, second lens face is the 3rd minute surface to the plane of object space, the cemented surface of the second lens and the 3rd lens is the 4th minute surface, 3rd lens face is the 5th minute surface to the convex surface of image space, 4th lens face is the 6th minute surface to the convex surface of object space, the cemented surface of the 4th lens and the 5th lens is the 7th minute surface, 5th lens face is the 8th minute surface to the convex surface of image space, the convex surface of the 6th lens is the 9th minute surface, the concave surface of the 6th lens is the tenth minute surface, 7th lens face is the 11 minute surface to the concave surface of object space, the cemented surface of the 7th lens and the 8th lens is the 12 minute surface, 8th lens face is the 13 minute surface to the concave surface of image space, the structural parameters of 13 minute surfaces are described object lens:
First minute surface is R1=-50.161 ~-49.159mm, D1=5.513 ~ 5.687mm, ψ 1=13.047 ~ 13.189mm;
Second minute surface is R2=-30.017 ~-29.122mm, D2=0.479 ~ 0.517mm, ψ 2=14.149 ~ 14.298mm;
3rd minute surface is R3=∞, D3=1.957 ~ 2.045mm, ψ 3=14.661 ~ 14.823mm;
4th minute surface is R4=47.019 ~ 47.981mm, D4=7.914 ~ 8.083mm, ψ 4=14.962 ~ 15.123mm;
5th minute surface is R5=-35.112 ~-34.407mm, D5=0.476 ~ 0.517mm, ψ 5=15.327 ~ 15.503mm;
6th minute surface is R6=25.112 ~ 25.886mm, D6=12.928 ~ 13.071mm, ψ 6=16.001 ~ 16.167mm;
7th minute surface is R7=-25.886 ~-25.112mm, D7=2.443 ~ 2.557mm, ψ 7=15.649 ~ 15.818mm;
8th minute surface is R8=-37.445 ~-36.672mm, D8=0.479 ~ 0.525mm, ψ 8=15.637 ~ 15.795mm;
9th minute surface is R9=18.501 ~ 19.265mm, D9=7.318 ~ 7.479mm, ψ 9=12.109 ~ 12.243mm;
Tenth minute surface is R10=38.968 ~ 39.769mm, D10=3.519 ~ 3.678mm, ψ 10=9.864 ~ 9.978mm;
11 minute surface is R11=-44.687 ~-43.779mm, D11=9.946 ~ 10.053mm, ψ 11=8.909 ~ 9.012mm;
12 minute surface is R12=-20.026 ~-19.421mm, D12=4.918 ~ 5.081mm, ψ 12=7.439 ~ 7.525mm;
13 minute surface is R13=14.902 ~ 15.371mm, D13=199.159 ~ 201.079mm, ψ 13=6.269 ~ 6.409mm.
Wherein R1 is the radius-of-curvature of the first minute surface; D1 is the minute surface distance of the first minute surface; ψ 1 is effective clear aperature of the first minute surface, the implication of R2-R13, D2-D13 and ψ 2-ψ 13 the like, the structural parameters of 13 minute surfaces see the following form:
The structural parameters of table 1 13 minute surfaces
Preferably, the focal length of the first lens is 87.25mm, the balsaming lens group focal length of the second lens and the 3rd lens composition is 240.12mm, the balsaming lens group focal length of the 4th lens and the 5th lens composition is 42.75mm, the focal length of the 6th lens is 75.33mm, and the balsaming lens group focal length of the 7th lens and the 8th lens composition is-13.53mm.。
Preferably, refractive index/the Abbe number of the first lens is 1.74693/50.95, refractive index/the Abbe number of the second lens is 1.85544/36.59, refractive index/Abbe number the 1.43335/94.52 of the 3rd lens, refractive index/the Abbe number of the 4th lens is 1.43335/94.52, refractive index/the Abbe number of the 5th lens is 1.74693/50.95, refractive index/the Abbe number of the 6th lens is 1.43335/94.52, refractive index/the Abbe number of the 7th lens is 1.92286/20.88, and the refractive index/Abbe number of the 8th lens is 1.78800/47.49.
Preferably, the maximum field of view of micro objective is 50mm.
Micro objective of the present invention, whole employing spheric glass, process with characterization processes completely compatible with existing optical mirror slip, low cost of manufacture, and under the structural parameters of 13 minute surfaces provided in the present invention, can realize the function increasing micro objective visual field, the visual field of micro objective can reach 50mm, reaches the effect significantly increasing micro objective visual field completely.
3. beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) micro objective of the present invention, all adopts spheric glass, processes with characterization processes completely compatible, low cost of manufacture with existing optical mirror slip;
(2), under the structural parameters of 13 minute surfaces that the present invention provides, can realize the function increasing micro objective visual field, the visual field of micro objective can reach 50mm, reaches the effect significantly increasing micro objective visual field completely;
(3) structure of the present invention is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is the structural representation of micro objective of the present invention;
Fig. 2 is under ZEMAX software simulation goes out embodiments of the invention 1 parameter, the parameter list of the visual field of micro objective;
Fig. 3, Fig. 4, Fig. 5 and Fig. 6 are that ZEMAX software simulation goes out under Fig. 2 visual field imposes a condition, micro objective image quality design sketch; Wherein Fig. 3 is optical path difference, its horizontal ordinate is normalization aperture, ordinate is the optical path difference of reference chief ray in units of wave number, Fig. 4 is the monochromatic encircled energy based on diffraction, its horizontal ordinate is the radius of diffraction pattern, ordinate is that energy in current radius accounts for the number percent of gross energy, Fig. 5 is polychromatic light optical transfer function, its horizontal ordinate is spatial frequency, and ordinate is transfer function values, Fig. 6 is ripple difference, and it is the optical path difference between actual corrugated and reference sphere.
In figure: L1-first lens; L2-second lens; L3-the 3rd lens; L4-the 4th lens; L5-the 5th lens; L6-the 6th lens; L7-the 7th lens; L8-the 8th lens.
Embodiment
Describe the present invention below in conjunction with concrete accompanying drawing.
Embodiment 1
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of micro objective, comprise eight spherical lenses of shaft device of sharing the same light, be arranged in order from object space to image space, be respectively from object space to eight of image space spherical lenses: the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7 and the 8th lens L8, it is characterized in that: the first lens L1 is concave surface towards object space, is convex surface towards image space, second lens L2 and the 3rd lens L3 consists of balsaming lens group, and wherein the second lens L2 is plane towards object space, is concave surface towards image space, 3rd lens L3 is convex surface towards object space, is convex surface towards image space, the second lens L2 towards the concave surface of image space and the 3rd lens L3 glued together towards the convex surface of object space, 4th lens L4 and the 5th lens L5 consists of balsaming lens group, and wherein the 4th lens L4 is convex surface towards object space, is convex surface towards image space, 5th lens L5 is concave surface towards object space, is convex surface towards image space, and the 4th lens L4 is combined towards the convex surface of image space and the 5th lens L5 towards the concave glue of object space, 6th lens L6 is convex surface towards object space, is concave surface towards image space, 7th lens L7 and the 8th lens L8 consists of balsaming lens group, and wherein the 7th lens L7 is concave surface towards object space, is convex surface towards image space, 8th lens L8 is concave surface towards object space, is concave surface towards image space, and the 7th lens L7 is combined towards the convex surface of image space and the 8th lens L8 towards the concave glue of object space, above-mentioned eight lens have 13 minute surfaces, the concave surface of the first lens L1 is the first minute surface, the convex surface of the first lens L1 is the second minute surface, second lens L2 is the 3rd minute surface towards the plane of object space, the cemented surface of the second lens L2 and the 3rd lens L3 is the 4th minute surface, 3rd lens L3 is the 5th minute surface towards the convex surface of image space, 4th lens L4 is the 6th minute surface towards the convex surface of object space, the cemented surface of the 4th lens L4 and the 5th lens L5 is the 7th minute surface, 5th lens L5 is the 8th minute surface towards the convex surface of image space, the convex surface of the 6th lens L6 is the 9th minute surface, the concave surface of the 6th lens L6 is the tenth minute surface, 7th lens L7 is the 11 minute surface towards the concave surface of object space, the cemented surface of the 7th lens L7 and the 8th lens L8 is the 12 minute surface, 8th lens L8 is the 13 minute surface towards the concave surface of image space, the structural parameters of 13 minute surfaces are:
The structural parameters of table 2 embodiment 10 three minute surfaces
Wherein the focal length of the first lens L1 is 87.25mm, the balsaming lens group focal length that second lens L2 and the 3rd lens L3 forms is 240.12mm, the balsaming lens group focal length that 4th lens L4 and the 5th lens L5 forms is 42.75mm, the focal length of the 6th lens L6 is 75.33mm, and the balsaming lens group focal length that the 7th lens L7 and the 8th lens L8 forms is-13.53mm.
In the present embodiment, the refractive index/Abbe number of the first lens is 1.74693/50.95, refractive index/the Abbe number of the second lens is 1.85544/36.59, refractive index/Abbe number the 1.43335/94.52 of the 3rd lens, refractive index/the Abbe number of the 4th lens is 1.43335/94.52, refractive index/the Abbe number of the 5th lens is 1.74693/50.95, refractive index/the Abbe number of the 6th lens is 1.43335/94.52, refractive index/the Abbe number of the 7th lens is 1.92286/20.88, and the refractive index/Abbe number of the 8th lens is 1.78800/47.49.
Gone out the experimental result of above parameter by ZEMAX software simulation, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, Fig. 2 is the parameter list of the visual field of micro objective.As can be seen from the parameter of Fig. 2, the visual field of its micro objective is 50mm.Reach the visual field of significantly improving micro objective completely.The visual field that its experimental result reaches micro objective is equally 50mm, reaches the effect significantly increasing micro objective visual field completely.
What Fig. 3 optical path difference was shown is under Large visual angle, and the situation of dispersion, as can be seen from image, under different visual field, optical path difference relation under the pupil coordinate of its meridional component and sagitta of arc component, X, Y represent sagitta of arc component and meridional component respectively, and the maximum perpendicular ratio of image is ± 5.000 wavelength, , see figure from left to right from top to bottom, the first width image represents that visual field point is 0.00mm, optical path difference curve map under the pupil coordinate of its meridional component and sagitta of arc component, and take abscissa axis as benchmark, it is 0.644 that each curve from the bottom to top represents wavelength respectively, 0.546, 0.480, the curve of 0.436, the second width image represents that visual field point is 12.50mm, optical path difference curve map under the pupil coordinate of its meridional component and sagitta of arc component, and take abscissa axis as benchmark, it is 0.644 that each curve from the bottom to top represents wavelength respectively, 0.546, 0.480, the curve of 0.436, the 3rd width image represents that visual field point is 17.68mm, and optical path difference curve map under the pupil coordinate of its meridional component and sagitta of arc component take abscissa axis as benchmark, and it is 0.644 that each curve from the bottom to top represents wavelength respectively, 0.546, 0.480, the curve of 0.436, the 4th width image represents that visual field point is 21.65mm, and optical path difference curve map under the pupil coordinate of its meridional component and sagitta of arc component take abscissa axis as benchmark, and it is 0.644 that each curve from the bottom to top represents wavelength respectively, 0.546, 0.480, the curve of 0.436, the 5th width image represents that visual field point is 25.00mm, and optical path difference curve map under the pupil coordinate of its meridional component and sagitta of arc component take abscissa axis as benchmark, and it is 0.644 that each curve from the bottom to top represents wavelength respectively, 0.546, 0.480, the curve of 0.436.Curve wherein in every secondary curve map is the closer to abscissa axis, and its optical path difference is better, and the dispersion that can be embodied whole visual field by image is better;
What the monochromatic encircled energy based on diffraction of Fig. 4 was shown is under Large visual angle, embody reasonable encircled energy, as can be seen from image, make a datum line, each curve is crossing with datum line from the bottom to top, its every bar curve represents that visual field point is 25.00mm respectively, 21.65mm, 17.68mm, 12.50mm, during 0.00mm, relation between the energy percentage of visual field and spot radius, wherein go up most the relation that a curve is ideally energy percentage and spot radius, other curves therewith between ideal curve gap the smaller the better, the good capability set moderate in whole visual field can be embodied from image,
What Fig. 5 polychromatic light optical transfer function was shown is under Large visual angle, can find out that its contrast is very good, and as can be seen from image, in image, T is meridional component, and S is sagitta of arc component, make a datum line, each curve is crossing with datum line from the bottom to top, its Article 1 curve represents that visual field point is the transport function of the meridional component of 17.68mm, Article 2 curve represents that visual field point is the transport function of the meridional component of 21.65mm, Article 3 curve represents that visual field point is the transport function of the meridional component of 12.50mm, Article 4 curve represents that visual field point is the transport function of the meridional component of 25.00mm, Article 5 curve represents that visual field point is the transport function of the sagitta of arc component of 21.65mm, Article 6 curve represents that visual field point is the transport function of the meridional component of 0.00mm and the transport function of sagitta of arc component, Article 7 curve represents that visual field point is the transport function of the sagitta of arc component of 12.50mm, Article 8 curve represents that visual field point is the transport function of the sagitta of arc component of 21.65mm, Article 9 curve represents that visual field point is the transport function of the sagitta of arc component of 17.68mm.Wherein Article 10 curve is transfer curve ideally, and other curves therewith ideal curve are better close to expression performance, can find out that its contrast of whole visual field is very good by image;
What Fig. 6 ripple difference was shown is under Large visual angle, and ripple difference and theoretical value are close to perfect.
Embodiment 2
With embodiment 1, difference is the structural parameters of 13 minute surfaces, specifically sees the following form:
The structural parameters of table 3 embodiment 20 three minute surfaces
The visual field that its experimental result reaches micro objective is equally 50mm, reaches the effect significantly increasing micro objective visual field completely.
Embodiment 3
With embodiment 1, difference is the structural parameters of 13 minute surfaces, specifically sees the following form:
The structural parameters of table 4 embodiment 30 three minute surfaces
The visual field that its experimental result reaches micro objective is equally 50mm, reaches the effect significantly increasing micro objective visual field completely.
Claims (5)
1. a micro objective, comprise eight spherical lenses of shaft device of sharing the same light, be arranged in order from object space to image space, be respectively from object space to eight of image space spherical lenses: the first lens (L1), the second lens (L2), the 3rd lens (L3), the 4th lens (L4), the 5th lens (L5), the 6th lens (L6), the 7th lens (L7) and the 8th lens (L8), it is characterized in that: the first lens (L1) are concave surface towards object space, is convex surface towards image space; Second lens (L2) and the 3rd lens (L3) consist of balsaming lens group, and wherein the second lens (L2) are plane towards object space, are concave surface towards image space; 3rd lens (L3) are convex surface towards object space, are convex surface towards image space, the second lens (L2) towards the concave surface of image space and the 3rd lens (L3) glued together towards the convex surface of object space; 4th lens (L4) and the 5th lens (L5) consist of balsaming lens group, and wherein the 4th lens (L4) are convex surface towards object space, are convex surface towards image space; 5th lens (L5) are concave surface towards object space, are convex surface towards image space, and the 4th lens (L4) are combined towards the convex surface of image space and the 5th lens (L5) towards the concave glue of object space; 6th lens (L6) are convex surface towards object space, are concave surface towards image space; 7th lens (L7) and the 8th lens (L8) consist of balsaming lens group, and wherein the 7th lens (L7) are concave surface towards object space, are convex surface towards image space; 8th lens (L8) are concave surface towards object space, are concave surface towards image space, and the 7th lens (L7) are combined towards the convex surface of image space and the 8th lens (L8) towards the concave glue of object space.
2. a kind of micro objective according to claim 1, it is characterized in that: described eight lens have 13 minute surfaces, the concave surface of the first lens (L1) is the first minute surface, the convex surface of the first lens (L1) is the second minute surface, second lens (L2) are the 3rd minute surface towards the plane of object space, the cemented surface of the second lens (L2) and the 3rd lens (L3) is the 4th minute surface, 3rd lens (L3) are the 5th minute surface towards the convex surface of image space, 4th lens (L4) are the 6th minute surface towards the convex surface of object space, the cemented surface of the 4th lens (L4) and the 5th lens (L5) is the 7th minute surface, 5th lens (L5) are the 8th minute surface towards the convex surface of image space, the convex surface of the 6th lens (L6) is the 9th minute surface, the concave surface of the 6th lens (L6) is the tenth minute surface, 7th lens (L7) are the 11 minute surface towards the concave surface of object space, the cemented surface of the 7th lens (L7) and the 8th lens (L8) is the 12 minute surface, 8th lens (L8) are the 13 minute surface towards the concave surface of image space, the structural parameters of 13 minute surfaces are:
First minute surface is R1=-50.161 ~-49.159mm, D1=5.513 ~ 5.687mm, ψ 1=13.047 ~ 13.189mm;
Second minute surface is R2=-30.017 ~-29.122mm, D2=0.479 ~ 0.517mm, ψ 2=14.149 ~ 14.298mm;
3rd minute surface is R3=∞, D3=1.957 ~ 2.045mm, ψ 3=14.661 ~ 14.823mm;
4th minute surface is R4=47.019 ~ 47.981mm, D4=7.914 ~ 8.083mm, ψ 4=14.962 ~ 15.123mm;
5th minute surface is R5=-35.112 ~-34.407mm, D5=0.476 ~ 0.517mm, ψ 5=15.327 ~ 15.503mm;
6th minute surface is R6=25.112 ~ 25.886mm, D6=12.928 ~ 13.071mm, ψ 6=16.001 ~ 16.167mm;
7th minute surface is R7=-25.886 ~-25.112mm, D7=2.443 ~ 2.557mm, ψ 7=15.649 ~ 15.818mm;
8th minute surface is R8=-37.445 ~-36.672mm, D8=0.479 ~ 0.525mm, ψ 8=15.637 ~ 15.795mm;
9th minute surface is R9=18.501 ~ 19.265mm, D9=7.318 ~ 7.479mm, ψ 9=12.109 ~ 12.243mm;
Tenth minute surface is R10=38.968 ~ 39.769mm, D10=3.519 ~ 3.678mm, ψ 10=9.864 ~ 9.978mm;
11 minute surface is R11=-44.687 ~-43.779mm, D11=9.946 ~ 10.053mm, ψ 11=8.909 ~ 9.012mm;
12 minute surface is R12=-20.026 ~-19.421mm, D12=4.918 ~ 5.081mm, ψ 12=7.439 ~ 7.525mm;
13 minute surface is R13=14.902 ~ 15.371mm, D13=199.159 ~ 201.079mm, ψ 13=6.269 ~ 6.409mm.
3. a kind of micro objective according to claim 2, it is characterized in that: the focal length of described first lens (L1) is 87.25mm, the balsaming lens group focal length that second lens (L2) and the 3rd lens (L3) form is 240.12mm, the balsaming lens group focal length that 4th lens (L4) and the 5th lens (L5) form is 42.75mm, the focal length of the 6th lens (L6) is 75.33mm, and the balsaming lens group focal length that the 7th lens (L7) and the 8th lens (L8) form is-13.53mm.
4. a kind of micro objective according to claim 3, it is characterized in that: the refractive index/Abbe number of described the first lens (L1) is 1.74693/50.95, refractive index/the Abbe number of the second lens is 1.85544/36.59, refractive index/Abbe number the 1.43335/94.52 of the 3rd lens, refractive index/the Abbe number of the 4th lens is 1.43335/94.52, refractive index/the Abbe number of the 5th lens is 1.74693/50.95, refractive index/the Abbe number of the 6th lens is 1.43335/94.52, refractive index/the Abbe number of the 7th lens is 1.92286/20.88, refractive index/the Abbe number of the 8th lens is 1.78800/47.49.
5. according to a kind of micro objective in claim 1,2 or 3 described in any one, it is characterized in that: described micro objective maximum field of view is 50mm.
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| CN108873272A (en) * | 2018-08-02 | 2018-11-23 | 浙江舜宇光学有限公司 | Optical imaging lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108873272A (en) * | 2018-08-02 | 2018-11-23 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN108873272B (en) * | 2018-08-02 | 2023-10-13 | 浙江舜宇光学有限公司 | Optical imaging lens |
| US11971523B2 (en) | 2018-08-02 | 2024-04-30 | Zhejiang Sunny Optical Co., Ltd | Optical imaging lens assembly |
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| CN104280868B (en) | 2016-09-21 |
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