CN116520552B - Optical system of target observation mirror - Google Patents
Optical system of target observation mirror Download PDFInfo
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- CN116520552B CN116520552B CN202310788362.0A CN202310788362A CN116520552B CN 116520552 B CN116520552 B CN 116520552B CN 202310788362 A CN202310788362 A CN 202310788362A CN 116520552 B CN116520552 B CN 116520552B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 23
- 239000011521 glass Substances 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 33
- 210000001747 pupil Anatomy 0.000 abstract description 12
- 238000003384 imaging method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/06—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors having a focussing action, e.g. parabolic mirror
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
Abstract
The invention provides a target observation mirror optical system, which is characterized in that: an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing first lens, a focusing second lens, a roof prism, an eyepiece lens first lens, an eyepiece lens second lens, an eyepiece lens third lens, an eyepiece lens fourth lens, an eyepiece lens fifth lens, an eyepiece lens sixth lens, an eyepiece lens seventh lens and an eyepiece lens eighth lens are sequentially designed from an object space to an image space, the focal length is 544mm, the field curvature is 5%, and the entrance pupil diameter (effective caliber) is 82mm.
Description
Technical Field
The invention relates to the technical field of telescope production, in particular to a target observation mirror optical system.
Background
The objective lens is an optical instrument for long-distance observation, most of traditional objective lenses in the market at present only have telescope functions, so that the objective lens has larger diameter and larger corresponding quality in order to pursue luminous flux and imaging, but even so, the objective lens still has serious distortion and imaging blurring problems.
Disclosure of Invention
The invention aims to provide a target observation mirror optical system, which shortens the total length of the whole optical system by using three groups of cemented lenses and meets the light and small indexes on the premise of ensuring the imaging quality.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a sight target optical system which characterized in that: an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing first lens, a focusing second lens, a roof prism, an eyepiece lens first lens, an eyepiece lens second lens, an eyepiece lens third lens, an eyepiece lens fourth lens, an eyepiece lens fifth lens, an eyepiece lens sixth lens, an eyepiece lens seventh lens and an eyepiece lens eighth lens are sequentially designed from an object space to an image space;
the first lens and the second lens of the objective lens are biconvex lenses, the third lens of the objective lens is biconcave lenses, the first focusing lens is biconvex lenses, the second focusing lens is biconcave lenses, and the first focusing lens and the second focusing lens form a cementing lens to realize focusing;
the first lens of the ocular is a concave lens, the concave surface faces the object space, the second lens of the ocular is a convex lens, the convex surface faces the image space, the third lens of the ocular is a biconcave lens, the second lens of the ocular and the third lens of the ocular form a cemented lens, the fourth lens of the ocular is a convex lens, the convex surface faces the image space, the fifth lens of the ocular is a biconvex lens, the sixth lens of the ocular is a concave lens, the concave surface faces the object space, the seventh lens of the ocular is a biconvex lens, the eighth lens of the ocular is a convex lens, and the convex surface faces the object space.
As a further improvement of the invention, the center thickness of the first lens of the objective lens is 10.5mm, the left side curvature radius is 163.68mm, the right side curvature radius is 478.6mm, the diameter is 86mm, and glass H-FK61 is adopted as a material; the thickness of the center of the second lens of the objective lens is 11mm, the curvature radius of the left side is 173.43mm, the curvature radius of the right side is 268.11mm, the diameter is 81mm, and glass H-FK61 is adopted as a material; the thickness of the center of the third lens of the objective lens is 3mm, the radius of curvature of the left side is 238.8mm, the radius of curvature of the right side is 238.8mm, and the diameter is 81mm, and the material is glass H-LAF2;
the thickness of the center of the focusing first lens is 4.5mm, the radius of curvature of the left side is 147.28mm, the radius of curvature of the right side is 147.28mm, the diameter is 40mm, and glass HF1 is adopted as a material; the thickness of the center of the focusing second lens is 2mm, the curvature radius of the left side is 147.28mm, the curvature radius of the right side is 65.31mm, the diameter is 40mm, and glass HBAK71 is adopted as a material;
the optical axis length of the roof prism is 94.2mm, which is equivalent to the thickness of an air layer of 52.13mm, the thickness of the plated antireflection film of 430-680mm, the apex angle of 45 degrees, two base angles of 67.5 degrees, the roof prism is an isosceles triangle, two equilateral lengths of 48mm and the base length of 34mm;
the thickness of the center of the first lens of the ocular lens is 1.2mm, the curvature radius of the left side is 13.183mm, the right side is an aspheric surface, the diameter is 22mm, and the glass D-ZK3 is adopted as the material;
the aspherical formula is as follows:
wherein: c=1/-143.936, k=0, a2=0, a4= -5.7052E-05, a6= -1.1083E-07, a8= -1.0431E-10, a10= -1.1277E-12;
the thickness of the center of the second lens of the ocular lens is 4.05mm, the radius of curvature of the left side is 255.9mm, the radius of curvature of the right side is 22.65mm, the diameter is 23mm, and the glass H-ZF7LA is adopted as the material; the thickness of the center of the third lens of the ocular lens is 1.25mm, the radius of curvature of the left side is 22.65mm, the radius of curvature of the right side is 106.66mm, the diameter is 24.6mm, and the glass H-QK3 is adopted as the material;
the center thickness of the fourth lens of the ocular lens is 3.98mm, the left side curvature radius is 66.07mm, the right side curvature radius is 32.06mm, the diameter is 32mm, and the glass H-LAK53A is adopted as the material; the thickness of the center of the fifth lens of the ocular lens is 14.6mm, the radius of curvature of the left side is 43.65mm, the radius of curvature of the right side is 19.055mm, the diameter is 33mm, and glass H-K9L is adopted as the material; the thickness of the center of the ocular sixth lens is 2mm, the radius of curvature of the left side is 19.055mm, the radius of curvature of the right side is 55.98mm, the diameter is 33mm, and glass H-ZF5 is adopted as the material; the thickness of the center of the seventh lens of the ocular lens is 5.3mm, the radius of curvature of the left side is 111.17mm, the radius of curvature of the right side is 77.27mm, the diameter is 36mm, and the glass H-LAK53A is adopted as the material; the thickness of the center of the eighth lens of the ocular lens is 5.5mm, the radius of curvature of the left side is 29.79mm, the radius of curvature of the right side is 448.7mm, the diameter is 28.5mm, and the glass H-ZK3 is adopted as the material.
As a further improvement of the present invention, the distance between the objective lens first lens and the objective lens second lens in the optical axis direction is 0.5mm, the distance between the objective lens second lens and the objective lens third lens is 4mm, the distance between the objective lens third lens and the focusing first lens is 160mm, the distance between the focusing second lens and the roof prism is 94.2mm, the distance between the roof prism and the eyepiece first lens is 20.2mm, the distance between the eyepiece first lens and the eyepiece second lens is 0.3mm, the distance between the eyepiece third lens and the eyepiece fourth lens is 12.5mm, the distance between the eyepiece fourth lens and the eyepiece fifth lens is 0.3mm, the distance between the eyepiece sixth lens and the eyepiece seventh lens is 0.5mm, and the distance between the eyepiece seventh lens and the eyepiece eighth lens is 17mm.
The beneficial effects of the invention are concentrated in that:
the optical system design is carried out by increasing the number of eyepiece lenses and the use of a cemented lens, so that the focal length 544mm, the field curvature 5%, the entrance pupil diameter (effective caliber) 82mm and the exit pupil diameter 2.7mm and the exit pupil distance 16mm are satisfied, and when the magnification is 30 times, the field of view is 2 degrees.
When the magnification is 60 times, the field of view is 1.3 degrees, the exit pupil diameter is 1.4mm, and the exit pupil distance is 13mm.
Drawings
FIG. 1 is a schematic diagram of an optical system of the present invention;
FIG. 2 is a graph of field curvature distortion of the present invention;
FIG. 3 is an aberration diagram of the present invention;
FIG. 4 is a dot column diagram of the present invention;
FIG. 5 is an axial color difference plot of the present invention;
FIG. 6 is a MTF diagram of the present invention;
fig. 7 is a center point luminance graph of the present invention.
Detailed Description
The invention is further elucidated below in connection with the accompanying drawings.
Wherein in fig. 6, the abscissa SPATIAL FREQUENCY IN CYCLES PER MILLIMETER represents the spatial frequency of line pairs PER millimeter (lp/MM), abbreviated as PER MM in the figure, the ordinate MODULUS OF THE OTF represents the optical modulation transfer function, abbreviated as OTF, POLYCHROMATIC oifftrack, i.e. what we said MTF, representing polychromatic diffraction MTF, the higher the curve, the better the imaging quality.
The utility model provides a sight target optical system which characterized in that: an objective first lens 1, an objective second lens 2, an objective third lens 3, a focusing first lens 4, a focusing second lens 5, a roof prism 6, an eyepiece first lens 7, an eyepiece second lens 8, an eyepiece third lens 9, an eyepiece fourth lens 10, an eyepiece fifth lens 11, an eyepiece sixth lens 12, an eyepiece seventh lens 13 and an eyepiece eighth lens 14 are sequentially designed from the object side to the image side;
the first lens 1 and the second lens 2 of the objective are biconvex lenses, the third lens 3 of the objective is biconcave lenses, the first focusing lens 4 is biconvex lenses, the second focusing lens 5 is biconcave lenses, and the first focusing lens 4 and the second focusing lens 5 form a cemented lens to realize focusing;
the eyepiece first lens 7 is a concave lens, the concave surface faces the object side, the eyepiece second lens 8 is a convex lens, the convex surface faces the image side, the eyepiece third lens 9 is a biconcave lens, the eyepiece second lens 8 and the eyepiece third lens 9 form a cemented lens, the eyepiece fourth lens 10 is a convex lens, the convex surface faces the image side, the eyepiece fifth lens 11 is a biconvex lens, the eyepiece sixth lens 12 is a concave lens, the concave surface faces the object side, the eyepiece fifth lens 11 and the eyepiece sixth lens 12 form a cemented lens, the eyepiece seventh lens 13 is a biconvex lens, the eyepiece eighth lens 14 is a convex lens, and the convex surface faces the object side.
As a further improvement of the invention, the center thickness of the first lens 1 of the objective lens is 10.5mm, the left curvature radius is 163.68mm, the right curvature radius is 478.6mm, the diameter is 86mm, and glass H-FK61 is adopted as a material; the thickness of the center of the second lens 2 of the objective lens is 11mm, the curvature radius of the left side is 173.43mm, the curvature radius of the right side is 268.11mm, the diameter is 81mm, and glass H-FK61 is adopted as a material; the thickness of the center of the third lens 3 of the objective lens is 3mm, the radius of curvature of the left side is 238.8mm, the radius of curvature of the right side is 238.8mm, the diameter is 81mm, and the material is glass H-LAF2;
the thickness of the center of the focusing first lens 4 is 4.5mm, the radius of curvature of the left side is 147.28mm, the radius of curvature of the right side is 147.28mm, the diameter is 40mm, and glass HF1 is adopted as a material; the thickness of the center of the focusing second lens 5 is 2mm, the curvature radius of the left side is 147.28mm, the curvature radius of the right side is 65.31mm, the diameter is 40mm, and glass HBAK71 is adopted as a material;
the optical axis length of the roof prism 6 is 94.2mm, which is equivalent to the thickness of an air layer of 52.13mm, the thickness of a plated antireflection film of 430-680mm, the apex angle of 45 degrees, two base angles of 67.5 degrees, the roof prism 6 is an isosceles triangle, two equilateral lengths of 48mm and the base length of 34mm;
the thickness of the center of the first eyepiece lens 7 is 1.2mm, the curvature radius of the left side is 13.183mm, the diameter of the right side is 22mm, and glass D-ZK3 is adopted as a material;
the aspherical formula is as follows:
wherein: c=1/-143.936, k=0, a2=0, a4= -5.7052E-05, a6= -1.1083E-07, a8= -1.0431E-10, a10= -1.1277E-12;
the thickness of the center of the ocular second lens 8 is 4.05mm, the radius of curvature of the left side is 255.9mm, the radius of curvature of the right side is 22.65mm, the diameter is 23mm, and glass H-ZF7LA is adopted as the material; the thickness of the center of the eyepiece third lens 9 is 1.25mm, the radius of curvature of the left side is 22.65mm, the radius of curvature of the right side is 106.66mm, the diameter is 24.6mm, and glass H-QK3 is adopted as a material;
the center thickness of the eyepiece fourth lens 10 is 3.98mm, the left side curvature radius is 66.07mm, the right side curvature radius is 32.06mm, the diameter is 32mm, and the glass H-LAK53A is adopted as a material; the center thickness of the ocular fifth lens 11 is 14.6mm, the left curvature radius is 43.65mm, the right curvature radius is 19.055mm, the diameter is 33mm, and the ocular fifth lens is made of glass H-K9L; the thickness of the center of the ocular sixth lens 12 is 2mm, the radius of curvature of the left side is 19.055mm, the radius of curvature of the right side is 55.98mm, the diameter is 33mm, and glass H-ZF5 is adopted as the material; the thickness of the center of the eyepiece seventh lens 13 is 5.3mm, the radius of curvature of the left side is 111.17mm, the radius of curvature of the right side is 77.27mm, the diameter is 36mm, and glass H-LAK53A is adopted as a material; the eyepiece eighth lens 14 has a center thickness of 5.5mm, a left side curvature radius of 29.79mm, a right side curvature radius of 448.7mm and a diameter of 28.5mm, and is made of glass H-ZK3.
As a further improvement of the present invention, the distance between the objective lens first lens 1 and the objective lens second lens 2 in the optical axis direction is 0.5mm, the distance between the objective lens second lens 2 and the objective lens third lens 3 is 4mm, the distance between the objective lens third lens 3 and the focusing first lens 4 is 160mm, the distance between the focusing second lens 5 and the roof prism 6 is 94.2mm, the distance between the roof prism 6 and the eyepiece first lens 7 is 20.2mm, the distance between the eyepiece first lens 7 and the eyepiece second lens 8 is 0.3mm, the distance between the eyepiece third lens 9 and the eyepiece fourth lens 10 is 12.5mm, the distance between the eyepiece fourth lens 10 and the eyepiece fifth lens 11 is 0.3mm, the distance between the eyepiece sixth lens 12 and the eyepiece seventh lens 13 is 0.5mm, and the distance between the eyepiece seventh lens 13 and the eyepiece eighth lens 14 is 17mm.
The optical system design is carried out by increasing the number of eyepiece lenses and the use of a cemented lens, so that the focal length 544mm, the field curvature 5%, the entrance pupil diameter (effective caliber) 82mm and the exit pupil diameter 2.7mm and the exit pupil distance 16mm are satisfied, and when the magnification is 30 times, the field of view is 2 degrees.
When the magnification is 60 times, the field of view is 1.3 degrees, the exit pupil diameter is 1.4mm, and the exit pupil distance is 13mm.
Through the use of three groups of cemented lenses, reflection loss is reduced to form better center imaging; the aspheric design concept is used for realizing clear imaging under high luminosity, the whole design concept and processing requirements are superior to those of a common target observation mirror, and compared with the common target observation mirror, the problems of fuzzy imaging and short exit pupil distance are solved.
Claims (3)
1. The utility model provides a sight target optical system which characterized in that: the lens comprises an object lens first lens (1), an object lens second lens (2), an object lens third lens (3), a focusing first lens (4), a focusing second lens (5), a roof prism (6), an eyepiece first lens (7), an eyepiece second lens (8), an eyepiece third lens (9), an eyepiece fourth lens (10), an eyepiece fifth lens (11), an eyepiece sixth lens (12), an eyepiece seventh lens (13) and an eyepiece eighth lens (14) which are sequentially designed from the object side to the image side; only the 13 lenses of the objective lens optical system have focal power;
the first lens (1) and the second lens (2) of the objective are biconvex lenses, the third lens (3) of the objective is biconcave lenses, the first focusing lens (4) is biconvex lenses, the second focusing lens (5) is biconcave lenses, and the first focusing lens (4) and the second focusing lens (5) form a cemented lens to realize focusing;
the eyepiece first lens (7) is a concave lens, the concave surface faces the object side, the eyepiece second lens (8) is a convex lens, the convex surface faces the image side, the eyepiece third lens (9) is a biconcave lens, the eyepiece second lens (8) and the eyepiece third lens (9) form a cemented lens, the eyepiece fourth lens (10) is a convex lens, the convex surface faces the image side, the eyepiece fifth lens (11) is a biconvex lens, the eyepiece sixth lens (12) is a concave lens, the concave surface faces the object side, the eyepiece fifth lens (11) and the eyepiece sixth lens (12) form a cemented lens, the eyepiece seventh lens (13) is a biconvex lens, and the eyepiece eighth lens (14) is a convex lens.
2. The objective optic system of claim 1, wherein: the thickness of the center of the first lens (1) of the objective lens is 10.5mm, the radius of curvature of the left side is 163.68mm, the radius of curvature of the right side is 478.6mm, the diameter is 86mm, and glass H-FK61 is adopted as a material; the thickness of the center of the second lens (2) of the objective lens is 11mm, the radius of curvature of the left side is 173.43mm, the radius of curvature of the right side is 268.11mm, the diameter is 81mm, and glass H-FK61 is adopted as a material; the thickness of the center of the third lens (3) of the objective lens is 3mm, the radius of curvature of the left side is 238.8mm, the radius of curvature of the right side is 238.8mm, the diameter is 81mm, and the material is glass H-LAF2;
the thickness of the center of the focusing first lens (4) is 4.5mm, the radius of curvature of the left side is 147.28mm, the radius of curvature of the right side is 147.28mm, the diameter is 40mm, and glass HF1 is adopted as a material; the thickness of the center of the focusing second lens (5) is 2mm, the radius of curvature of the left side is 147.28mm, the radius of curvature of the right side is 65.31mm, the diameter is 40mm, and glass HBAK71 is adopted as a material;
the optical axis length of the roof prism (6) is 94.2mm, which is equivalent to the thickness of an air layer of 52.13mm, the thickness of the plated antireflection film of 430-680mm, the apex angle of 45 degrees, two base angles of 67.5 degrees, the roof prism 6 is an isosceles triangle, two equilateral lengths of 48mm and the base length of 34mm;
the thickness of the center of the first eyepiece lens (7) is 1.2mm, the curvature radius of the left side is 13.183mm, the diameter of the right side is 22mm, and the first eyepiece lens is made of glass D-ZK3;
the center thickness of the second eyepiece lens (8) is 4.05mm, the left side curvature radius is 255.9mm, the right side curvature radius is 22.65mm, the diameter is 23mm, and the second eyepiece lens is made of glass H-ZF7LA; the center thickness of the eyepiece third lens (9) is 1.25mm, the left side curvature radius is 22.65mm, the right side curvature radius is 106.66mm, the diameter is 24.6mm, and the eyepiece third lens is made of glass H-QK3;
the center thickness of the eyepiece fourth lens (10) is 3.98mm, the left side curvature radius is 66.07mm, the right side curvature radius is 32.06mm, the diameter is 32mm, and the glass H-LAK53A is adopted as a material; the center thickness of the fifth eyepiece lens (11) is 14.6mm, the left side curvature radius is 43.65mm, the right side curvature radius is 19.055mm, the diameter is 33mm, and the glass H-K9L is adopted as a material; the thickness of the center of the ocular sixth lens (12) is 2mm, the radius of curvature of the left side is 19.055mm, the radius of curvature of the right side is 55.98mm, the diameter is 33mm, and glass H-ZF5 is adopted as the material; the thickness of the center of the seventh ocular lens (13) is 5.3mm, the radius of curvature of the left side is 111.17mm, the radius of curvature of the right side is 77.27mm, the diameter is 36mm, and the glass H-LAK53A is adopted as the material; the thickness of the center of the eighth eyepiece lens (14) is 5.5mm, the curvature radius of the left side is 29.79mm, the curvature radius of the right side is 448.7mm, the diameter is 28.5mm, the eighth eyepiece lens is made of glass H-ZK3, the left side is the object side of the objective lens optical system, and the right side is the image side of the objective lens optical system.
3. The objective optic system of claim 1, wherein: the distance between the objective lens first lens (1) and the objective lens second lens (2) along the optical axis direction is 0.5mm, the distance between the objective lens second lens (2) and the objective lens third lens (3) is 4mm, the distance between the objective lens third lens (3) and the focusing first lens (4) is 160mm, the distance between the focusing second lens (5) and the roof prism (6) is 94.2mm, the distance between the roof prism (6) and the eyepiece first lens (7) is 20.2mm, the distance between the eyepiece first lens (7) and the eyepiece second lens (8) is 0.3mm, the distance between the eyepiece third lens (9) and the eyepiece fourth lens (10) is 12.5mm, the distance between the eyepiece fourth lens (10) and the eyepiece fifth lens (11) is 0.3mm, the distance between the eyepiece sixth lens (12) and the eyepiece seventh lens (13) is 0.5mm, and the distance between the eyepiece seventh lens (13) and the eighth lens (14) is 17mm.
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| CN113287050A (en) * | 2019-01-11 | 2021-08-20 | 卡尔蔡司股份公司 | Optical system for imaging an object and method for operating an optical system |
| JP2021128310A (en) * | 2020-02-17 | 2021-09-02 | キヤノン株式会社 | Observation optical system and observation device |
| JP2023048482A (en) * | 2021-09-28 | 2023-04-07 | キヤノン株式会社 | Observation optical system and observation device having the same |
| CN115166962A (en) * | 2022-07-05 | 2022-10-11 | 福建优恩立光电科技有限公司 | Transmission-type monocular telescope for visual observation |
| CN217689590U (en) * | 2022-07-28 | 2022-10-28 | 光虎光电科技(苏州)有限公司 | Large-target-surface line scanning double-telecentric lens |
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