CN118859509B - Large-view-field telescope optical system - Google Patents
Large-view-field telescope optical system Download PDFInfo
- Publication number
- CN118859509B CN118859509B CN202411348325.9A CN202411348325A CN118859509B CN 118859509 B CN118859509 B CN 118859509B CN 202411348325 A CN202411348325 A CN 202411348325A CN 118859509 B CN118859509 B CN 118859509B
- Authority
- CN
- China
- Prior art keywords
- lens
- eyepiece
- curvature radius
- objective
- object side
- 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.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 31
- 239000011521 glass Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 210000001747 pupil Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 241000226585 Antennaria plantaginifolia Species 0.000 description 1
- 241001479578 Packera contermina Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- 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
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Telescopes (AREA)
- Lenses (AREA)
Abstract
The invention belongs to the technical field of telescope manufacturing, and discloses a large-view-field telescope optical system, which is characterized in that an objective lens first lens, an objective lens cemented lens, a focusing lens, an Abbe prism group, an eyepiece cemented lens, an eyepiece lens third lens and an eyepiece lens fourth lens are sequentially arranged from an object side to an image side along an optical axis direction, wherein the objective lens first lens is a plano-convex lens, a convex surface faces to the object side, a plane faces to the image side, the objective lens cemented lens is formed by an objective lens second lens and an objective lens third lens, the objective lens second lens is a biconcave lens, the focusing lens is a convex-concave lens, the convex surface faces to the object side, the eyepiece lens cemented lens is formed by the eyepiece lens first lens and the eyepiece lens second lens, the eyepiece lens second lens is a biconvex lens, the eyepiece lens fourth lens is a biconvex lens, and the view field is 6.9 degrees.
Description
Technical Field
The invention relates to the technical field of telescope manufacturing, in particular to a large-view-field telescope optical system.
Background
The telescope is an optical instrument for observing remote objects by using lenses or reflectors and other optical devices, is based on the principle that light rays are refracted by lenses or reflected by concave mirrors to enter small holes and are converged to form images, is seen through a magnifying eyepiece, is also called a ' senecio ' telescope ', telescope has multiple functions, comprises magnifying the opening angle of the remote objects, enables the eyes to see details with smaller angular distance, and sends light beams which are collected by an objective lens and are much thicker than the pupil diameter into the eyes, enables observers to see dark and weak objects which are not seen originally, telescope types are various, comprises astronomical telescope, binoculars and the like.
The field of view of a binoculars is the range of sky that can be observed, is usually expressed in terms of angle, the larger the field of view is, the wider the observation range is , the field of view is an important parameter of the binoculars, determines the field of view that can be observed by the binoculars, is generally, the larger the caliber of is, the more the amount of light enters, the brighter the image that is observed, and the field of view of many telescope optical systems is designed to be small at present, and the thing observation is very fuzzy. A
Disclosure of Invention
The present invention is directed to an optical system of a large-field telescope, which solves the problems set forth in the background art.
In order to solve the technical problems, the invention provides a large-view-field telescope optical system which is characterized in that an objective lens first lens, an objective lens cemented lens, a focusing lens, an Abbe prism group, an eyepiece cemented lens, an eyepiece lens third lens and an eyepiece lens fourth lens are sequentially arranged from an object side to an image side along an optical axis direction,
The first lens of the objective lens is a plano-convex lens, the convex surface faces the object side, the plane faces the image side, the cementing lens of the objective lens is formed by cementing the second lens of the objective lens and the third lens of the objective lens, the second lens of the objective lens is a biconvex lens, the third lens of the objective lens is a biconcave lens, the focusing lens is a convex-concave lens, and the convex surface faces the object side;
the eyepiece cemented lens is formed by a first eyepiece lens and a second eyepiece lens, wherein the first eyepiece lens is a biconcave lens, the second eyepiece lens is a biconvex lens, the third eyepiece lens is a biconvex lens, and the fourth eyepiece lens is a biconvex lens.
According to the preferable technical scheme, the object side curvature radius of the first lens of the objective lens is 128.7mm, the image side is a plane, the center thickness is 7mm, glass H-K9L is adopted as a material, the diameter is 57mm, the object side curvature radius of the second lens of the objective lens is 69.7mm, the image side curvature radius is-336.7 mm, the center thickness is 9.5mm, the material is glass H-K9L, the diameter is 54mm, the object side curvature radius of the third lens of the objective lens is-336.7 mm, the image side curvature radius is 336.7mm, the center thickness is 4mm, the material is glass H-ZF7LA, the diameter is 54mm, the focusing lens object side curvature radius is 87.9mm, the image side curvature radius is 45.19mm, the center thickness is 3mm, the material is glass H-K9L, and the diameter is 31mm;
The first lens of the ocular has an object-side curvature radius of-381 mm, an image-side curvature radius of 22.97mm, a center thickness of 2.2mm, glass H-ZF7LA with a diameter of 29mm, the second lens of the ocular has an object-side curvature radius of 22.97mm, an image-side curvature radius of-28.95 mm, a center thickness of 11.5mm, glass H-K9L with a diameter of 29mm, the third lens of the ocular has an object-side curvature radius of 39.4mm, an image-side curvature radius of-115.1 mm, a center thickness of 5.6mm, glass H-K9L with a diameter of 30mm, the fourth lens of the ocular has an object-side curvature radius of 25.37mm, an image-side curvature radius of-268.6 mm, a center thickness of 6.5mm, and a diameter of 29mm.
As a preferable technical scheme, a distance between the objective lens first lens and the objective lens second lens in the optical axis direction is 0.7mm, a distance between the objective lens third lens and the focusing lens is 40.5mm, a distance between the focusing lens and the abbe prism assembly object side is 25.5mm, a distance between the abbe prism assembly image side and the eyepiece lens first lens is 15.48mm, a distance between the eyepiece lens second lens and the eyepiece lens third lens is 0.2mm, and a distance between the eyepiece lens third lens and the eyepiece lens fourth lens is 0.2mm.
Compared with the prior art, the invention has the following beneficial effects:
The telescope optical system has the multiplying power of 8.5, the exit pupil diameter of 6.4mm, the exit pupil distance of 20.3mm, the view field of 6.9 degrees, an objective lens group consisting of an objective lens first lens, an objective lens cemented lens and a focusing lens, the focal length of the objective lens group of 178.3mm, an eyepiece lens group consisting of an eyepiece cemented lens, an eyepiece lens third lens and an eyepiece lens fourth lens, and the focal length of the eyepiece lens group of 21.2mm.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the 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 a dot column diagram of the present invention;
Fig. 4 is a color difference chart of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, the invention provides a technical scheme that a large-view-field telescope optical system is characterized in that an objective lens first lens 1, an objective lens cemented lens 2, a focusing lens 3, an abbe prism group 4, an eyepiece cemented lens 5, an eyepiece third lens 6 and an eyepiece fourth lens 7 are sequentially arranged from an object side to an image side along an optical axis direction,
The objective lens first lens 1 is a plano-convex lens, the convex surface faces the object side, the plane faces the image side, the objective lens cemented lens 2 is formed by cementing an objective lens second lens 2a and an objective lens third lens 2b, the objective lens second lens 2a is a biconvex lens, the objective lens third lens 2b is a biconcave lens, the focusing lens 3 is a convex-concave lens, and the convex surface faces the object side;
The eyepiece cemented lens 5 is formed by a first eyepiece lens 5a and a second eyepiece lens 5b, the first eyepiece lens 5a is a biconcave lens, the second eyepiece lens 5b is a biconvex lens, the third eyepiece lens 6 is a biconvex lens, and the fourth eyepiece lens 7 is a biconvex lens.
According to the preferable technical scheme, the object side curvature radius of the first lens 1 of the objective lens is 128.7mm, the image side is a plane, the center thickness is 7mm, glass H-K9L is adopted as a material, the diameter is 57mm, the object side curvature radius of the second lens 2a of the objective lens is 69.7mm, the image side curvature radius is-336.7 mm, the center thickness is 9.5mm, glass H-K9L is adopted as a material, the diameter is 54mm, the object side curvature radius of the third lens 2b of the objective lens is-336.7 mm, the image side curvature radius is 336.7mm, the center thickness is 4mm, the material is glass H-ZF7LA, the diameter is 54mm, the object side curvature radius of the focusing lens 3 is 87.9mm, the image side curvature radius is 45.19mm, the center thickness is 3mm, and the diameter is 31 mm.
The first eyepiece lens 5a has an object-side curvature radius of-381 mm, an image-side curvature radius of 22.97mm, a center thickness of 2.2mm, glass H-ZF7LA with a diameter of 29mm, the second eyepiece lens 5b has an object-side curvature radius of 22.97mm, an image-side curvature radius of-28.95 mm, a center thickness of 11.5mm, glass H-K9L with a diameter of 29mm, the third eyepiece lens 6 has an object-side curvature radius of 39.4mm, an image-side curvature radius of-115.1 mm, a center thickness of 5.6mm, glass H-K9L with a diameter of 30mm, the fourth eyepiece lens 7 has an object-side curvature radius of 25.37mm, an image-side curvature radius of-268.6 mm, a center thickness of 6.5mm, and a diameter of 29mm.
As a preferable embodiment, the distance between the objective lens first lens 1 and the objective lens second lens 2a in the optical axis direction is 0.7mm, the distance between the objective lens third lens 2b and the focusing lens 3 is 40.5mm, the distance between the focusing lens 3 and the object side of the abbe prism group 4 is 25.5mm, the distance between the image side of the abbe prism group 4 and the eyepiece first lens 5a is 15.48mm, the distance between the eyepiece second lens 5b and the eyepiece third lens 6 is 0.2mm, and the distance between the eyepiece third lens 6 and the eyepiece fourth lens 7 is 0.2mm.
The telescope optical system has the magnification of 8.5, the exit pupil diameter of 6.4mm, the exit pupil distance of 20.3mm, the view field of 6.9 degrees, an objective lens group consisting of an objective lens first lens 1, an objective lens cemented lens 2 and a focusing lens 3, the focal length of the objective lens group of 178.3mm, an eyepiece lens group consisting of an eyepiece cemented lens 5, an eyepiece lens third lens 6 and an eyepiece lens fourth lens 7, the focal length of the eyepiece group of 21.2mm, the length of an optical axis of an object side of the Abbe prism group 4 of 48.31mm, the length of an optical axis of a right side of the Abbe prism group 4 of 40mm, the focusing lens 3 moves 10mm towards the image side direction, corresponding to the nearest focusing distance of 2.8m, and the focusing lens moves 2mm towards the image side direction, corresponding to the low magnification infinity of 6.8 visual degrees.
The application uses the Abbe prism group 4, the Abbe prism group 4 is used as a total reflection prism, can bring higher light transmittance, can lead optical instruments such as telescope and the like to obtain brighter and clearer images when in use.
Fig. 2 is a field curvature distortion chart of the present application, field curvature distortion chart analysis is an important tool for evaluating imaging quality of an optical system, reveals influence of field curvature and distortion on imaging effect, is also called image field curvature, describes that clear image points formed by are not on a plane after a plane object passes through a lens system, is a curved surface, distortion reflects similarity degree of an object image, comprises barrel distortion, pincushion distortion and other types, and as can be seen from fig. 2, field curvature of the present application is small, edges and centers are clear, image quality is good, distortion is lower than 5%, and distortion of an image cannot be observed by human eyes after telescope imaging.
FIG. 3 is a plot of the present application, wherein the distribution of points in the plot is uniform and dense, has no obvious outliers or outliers, the more average the data distribution is, indicates that the imaging quality is more stable, the more concentrated the energy of the plot of the optical system is, and the more clear the imaging is.
Fig. 4 is a color chart of the present application, which is a visualization tool for showing color difference in imaging of an optical system, shows that since lenses have different refractive indexes for light rays with different wavelengths, causes separation of polychromatic light after passing through the lenses, cannot be focused on the same point, causes color difference on an imaging surface, and the optical system of the present application has no obvious color difference under the condition of visible light.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411348325.9A CN118859509B (en) | 2024-09-26 | 2024-09-26 | Large-view-field telescope optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411348325.9A CN118859509B (en) | 2024-09-26 | 2024-09-26 | Large-view-field telescope optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118859509A CN118859509A (en) | 2024-10-29 |
| CN118859509B true CN118859509B (en) | 2024-12-17 |
Family
ID=93161448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411348325.9A Active CN118859509B (en) | 2024-09-26 | 2024-09-26 | Large-view-field telescope optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118859509B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796184U (en) * | 2010-05-11 | 2011-04-13 | 昆明远达光学有限公司 | Telescope and lens set with additional focal-length adjusting lens |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203241613U (en) * | 2013-05-09 | 2013-10-16 | 云南奥凯科技开发有限责任公司 | Inner focusing mechanism of Porro telescope |
| CN110058419B (en) * | 2019-04-28 | 2021-08-17 | 金华市蓝海光电技术有限公司 | Erecting system and binocular laser ranging telescope |
| CN213240656U (en) * | 2020-10-26 | 2021-05-18 | 昆明昆光光电科技有限公司 | Single-cylinder type adjustable target observation mirror |
| CN215769183U (en) * | 2021-07-05 | 2022-02-08 | 深圳市爱派赛科技有限公司 | Optical system of close-up telescope |
| CN217879811U (en) * | 2022-07-11 | 2022-11-22 | 中山市美景光学信息有限公司 | Wide-angle telescope for distance measurement |
| CN116990954B (en) * | 2023-08-25 | 2024-03-19 | 昆明汉睿光学仪器有限公司 | Telescope optical system |
-
2024
- 2024-09-26 CN CN202411348325.9A patent/CN118859509B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796184U (en) * | 2010-05-11 | 2011-04-13 | 昆明远达光学有限公司 | Telescope and lens set with additional focal-length adjusting lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118859509A (en) | 2024-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7389987B2 (en) | Galilean wide-angle foveal telescope | |
| US4735491A (en) | Optical system for endoscopes | |
| CN106125268B (en) | A kind of liquid lens zoom lens and the camera shooting instrument including it | |
| RU2368924C2 (en) | High-aperture catadioptric lens | |
| JP2002350734A (en) | Liquid immersion system microscopic objective lens | |
| CN117075324B (en) | Telescope optical system | |
| CN118859509B (en) | Large-view-field telescope optical system | |
| US5612823A (en) | Wide-field eyepiece with inside focus | |
| US5625488A (en) | Telecentric relay lens system | |
| JP6392947B2 (en) | Immersion microscope objective lens and microscope using the same | |
| RU222247U1 (en) | Mirror-lens binoculars | |
| RU2154292C2 (en) | Fast lens | |
| CN116755232B (en) | Catadioptric optical lens | |
| CN118884692B (en) | Telescope optical system with long exit pupil distance | |
| RU2239214C2 (en) | Ocular with external entrance pupil | |
| RU2834990C1 (en) | Projection lens | |
| CN215181203U (en) | Eyepiece for measuring interpupillary distance of large eye for scattering | |
| SU1645925A1 (en) | Binocular instrument optical system | |
| RU204248U1 (en) | LENS | |
| RU2181207C1 (en) | High-speed lens | |
| RU12264U1 (en) | MIRROR LENS LENS | |
| RU2364901C1 (en) | Ocular | |
| CN119644574A (en) | Telescope system of 20X42 | |
| RU2092880C1 (en) | Ocular | |
| US4384765A (en) | Six-component microscope objective |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |