CN116990954A - Telescope optical system - Google Patents
Telescope optical system Download PDFInfo
- Publication number
- CN116990954A CN116990954A CN202311076515.5A CN202311076515A CN116990954A CN 116990954 A CN116990954 A CN 116990954A CN 202311076515 A CN202311076515 A CN 202311076515A CN 116990954 A CN116990954 A CN 116990954A
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- China
- Prior art keywords
- lens
- eyepiece
- objective
- curvature radius
- object side
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 230000005499 meniscus Effects 0.000 claims description 3
- 210000001747 pupil Anatomy 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000000007 visual effect Effects 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
-
- 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
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
Abstract
The invention provides a telescope optical system, which relates to the technical field of optical element, system or instrument production, and is characterized in that: an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing lens, a roof prism, a semi-penta prism, an eyepiece lens first lens, an eyepiece lens second lens, an eyepiece lens third lens, an eyepiece lens fourth lens and an eyepiece lens fifth lens are sequentially designed from an object side to an image side, optical elements of the telescope optical system with focal power are only the 9 lenses, when the magnification is 14.6 times, the exit pupil diameter is 3.83mm, and the view field is 4.54 degrees.
Description
Technical Field
The invention relates to the technical field of optical element, system or instrument production, in particular to a telescope optical system.
Background
Telescope is common observation equipment, and the overall weight reduction of telescope is the development direction in market, guarantees the visual field and the focal length of whole optical system under the prerequisite of weight reduction and is the present difficulty.
Disclosure of Invention
The invention aims to provide a telescope optical system, which shortens the total length of the whole optical system by using two groups of cemented lenses, and meets the light and small index on the premise of ensuring the imaging quality, wherein when the magnification is 14.6 times, the total length of the whole optical system is 168.15mm, the view field is 4.54 degrees, the focal length of an objective lens group is 212.92mm, and the focal length of the eyepiece lens group is 14.55mm.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a telescope optical system, characterized by: an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing lens, a roof prism, a semi-penta prism, an eyepiece lens first lens, an eyepiece lens second lens, an eyepiece lens third lens, an eyepiece lens fourth lens and an eyepiece lens fifth lens are sequentially designed from an object side to an image side, and optical elements of the telescope optical system with focal power are only the 9 lenses;
the first lens of the objective lens is a convex lens with a convex surface facing to the object side, the second lens of the objective lens and the third lens of the objective lens form a cemented 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 meniscus lens with a concave surface facing to the image side, the first lens of the eyepiece is a concave lens with a concave surface facing to the image side, the second lens of the eyepiece is a concave lens with a concave surface facing to the object side, the third lens of the eyepiece and the fourth lens of the eyepiece form a cemented lens, the third lens of the eyepiece is a biconvex lens, the fourth lens of the eyepiece is a concave lens with a concave surface facing to the object side, and the fifth lens of the eyepiece is a convex lens with a convex surface facing to the object side.
As a further improvement of the invention, the center thickness of the first lens of the objective lens is 7.2mm, the curvature radius of the object side is 104.95mm, the curvature radius of the image side is-972.7 mm, and the contour diameter is 57.5mm; the center thickness of the second lens of the objective lens is 9mm, the curvature radius of the object side is 90.16mm, the curvature radius of the image side is-207 mm, and the contour diameter is 56mm; the thickness of the center of the third lens of the objective lens is 4.2mm, the curvature radius of the object side is-207 mm, the curvature radius of the image side is 207mm, and the contour diameter is 56mm; the center thickness of the focusing lens is 3mm, the curvature radius of the object side is 87.9mm, the curvature radius of the image side is 40.93mm, and the contour diameter is 30mm; the center thickness of the first lens of the ocular lens is 2.1mm, the object side plane, the curvature radius of the image side is 23.88mm, and the contour diameter is 18mm; the center thickness of the second lens of the ocular lens is 5mm, the curvature radius of the object side is-28.71 mm, the curvature radius of the image side is-16.52 mm, and the contour diameter is 25mm; the center thickness of the third lens of the ocular lens is 9.1mm, the curvature radius of the object side is 57.54mm, the curvature radius of the image side is-16.52 mm, and the contour diameter is 25mm; the center thickness of the fourth lens of the ocular lens is 2.1mm, the curvature radius of the object side is-16.52 mm, the curvature radius of the image side is-84.33 mm, and the contour diameter is 25mm; the center thickness of the fifth eyepiece lens is 5.8mm, the object side curvature radius is 22.18mm, the image side curvature radius is-304.8 mm, and the contour diameter is 25mm.
As a further improvement of the present invention, the total length from the object side of the objective lens first lens to the image side of the eyepiece lens fifth lens is 168.15mm, 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 eyepiece lens third lens and the focusing lens is 58.01mm, the distance between the focusing lens and the roof prism is 20mm, the distance between the half pentaprism and the eyepiece lens first lens is 2.81mm, the distance between the eyepiece lens first lens and the eyepiece lens second lens is 11.51mm, the distance between the eyepiece lens second lens and the eyepiece lens third lens is 0.3mm, and the distance between the eyepiece lens fourth lens and the eyepiece lens fifth lens is 0.3mm.
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, the total length of the whole optical system is 168.15mm, the field of view is 4.54 degrees, the exit pupil diameter is 3.83mm, and the exit pupil distance is 16.4mm when the magnification is 14.6 times.
The first lens, the second lens and the third lens form an objective front group, and the focal length of the objective front group is 133.81mm; the front objective group and the focusing lens form an objective group, and the focal length of the objective group is 212.92mm; the first lens of ocular, the second lens of ocular, the third lens of ocular, the fourth lens of ocular, the fifth lens of ocular form the ocular group, the focal length of ocular group is 14.55mm.
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.
Description of the embodiments
The invention is further elucidated below in connection with the accompanying drawings.
A telescope optical system, characterized by: an objective first lens 1, an objective second lens 2, an objective third lens 3, a focusing lens 4, a roof prism 5, a half pentaprism 6, an eyepiece first lens 7, an eyepiece second lens 8, an eyepiece third lens 9, an eyepiece fourth lens 10 and an eyepiece fifth lens 11 are sequentially designed from the object side to the image side, and optical elements of the telescope optical system with optical power are only the 9 lenses;
the objective lens first lens 1 is a convex lens with a convex surface facing the object side, the objective lens second lens 2 and the objective lens third lens 3 form a cemented lens, the objective lens second lens 2 is a biconvex lens, the objective lens third lens 3 is a biconcave lens, the focusing lens 4 is a meniscus lens with a concave surface facing the image side, the eyepiece lens first lens 7 is a concave lens with a concave surface facing the image side, the eyepiece lens second lens 8 is a concave surface facing the object side concave lens, the eyepiece lens third lens 9 and the eyepiece lens fourth lens 10 form a cemented lens, the eyepiece lens third lens 9 is a biconvex lens, the eyepiece lens fourth lens 10 is a concave lens with a concave surface facing the object side, and the eyepiece lens fifth lens 11 is a convex lens with a convex surface facing the object side.
As a further improvement of the present invention, the center thickness of the objective lens first lens 1 is 7.2mm, the object side curvature radius is 104.95mm, the image side curvature radius is-972.7 mm, and the contour diameter is 57.5mm; the center thickness of the objective lens second lens 2 is 9mm, the curvature radius of the object side is 90.16mm, the curvature radius of the image side is-207 mm, and the contour diameter is 56mm; the center thickness of the third lens 3 of the objective lens is 4.2mm, the curvature radius of the object side is-207 mm, the curvature radius of the image side is 207mm, and the contour diameter is 56mm; the center thickness of the focusing lens 4 is 3mm, the curvature radius of the object side is 87.9mm, the curvature radius of the image side is 40.93mm, and the contour diameter is 30mm; the center thickness of the eyepiece first lens 7 is 2.1mm, the object side plane, the image side curvature radius is 23.88mm, and the contour diameter is 18mm; the center thickness of the eyepiece second lens 8 is 5mm, the object side curvature radius is-28.71 mm, the image side curvature radius is-16.52 mm, and the contour diameter is 25mm; the center thickness of the eyepiece third lens 9 is 9.1mm, the object side curvature radius is 57.54mm, the image side curvature radius is-16.52 mm, and the contour diameter is 25mm; the center thickness of the eyepiece fourth lens 10 is 2.1mm, the object side curvature radius is-16.52 mm, the image side curvature radius is-84.33 mm, and the contour diameter is 25mm; the eyepiece fifth lens 11 has a center thickness of 5.8mm, an object side radius of curvature of 22.18mm, an image side radius of curvature of-304.8 mm, and a contour diameter of 25mm.
As a further improvement of the present invention, the total length from the object side of the objective lens first lens 1 to the image side of the eyepiece lens fifth lens 11 is 168.15mm, 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 eyepiece lens third lens 3 and the focusing lens 4 is 58.01mm, the distance between the focusing lens 4 and the roof prism 5 is 20mm, the distance between the half pentaprism 6 and the eyepiece lens first lens 7 is 2.81mm, the distance between the eyepiece lens first lens 7 and the eyepiece lens second lens 8 is 11.51mm, the distance between the eyepiece lens second lens 8 and the eyepiece lens third lens 9 is 0.3mm, and the distance between the eyepiece lens fourth lens 10 and the eyepiece lens fifth lens 11 is 0.3mm.
The first lens 1, the second lens 2 and the third lens 3 form a front group of the objective, and the focal length of the front group of the objective is 133.81mm; the front objective group and the focusing lens 4 form an objective group, and the focal length of the objective group is 212.92mm; the first eyepiece lens 7, the second eyepiece lens 8, the third eyepiece lens 9, the fourth eyepiece lens 10 and the fifth eyepiece lens 11 form an eyepiece lens group, and the focal length of the eyepiece lens group is 14.55mm.
The eyepiece group moves by one vision distance of 0.21mm, the focusing lens 4 moves backward by 12mm, the corresponding nearest distance is 2.7m, the focusing lens 4 moves forward by 0.68m, the corresponding vision is-5 diopters, the optical axis length of the roof prism 5 is 59.346mm, and the optical axis length of the half pentaprism 6 is 37.36mm.
The optical system design is carried out by increasing the number of eyepiece lenses and the use of a cemented lens, the total length of the whole optical system is 168.15mm, the field of view is 4.54 degrees, the exit pupil diameter is 3.83mm, and the exit pupil distance is 16.4mm when the magnification is 14.6 times.
Claims (3)
1. A telescope optical system, characterized by: an objective first lens (1), an objective second lens (2), an objective third lens (3), a focusing lens (4), a roof prism (5), a half pentaprism (6), an eyepiece first lens (7), an eyepiece second lens (8), an eyepiece third lens (9), an eyepiece fourth lens (10) and an eyepiece fifth lens (11) are sequentially designed from the object side to the image side, and the optical elements of the telescope optical system with focal power are only the 9 lenses;
the lens system comprises an objective lens first lens (1) and an eyepiece second lens (2) and an objective lens third lens (3), wherein the objective lens first lens (1) is a convex lens with a convex surface facing an object side, the objective lens second lens (2) is a biconvex lens, the objective lens third lens (3) is a biconcave lens, a focusing lens (4) is a meniscus lens with a concave surface facing an image side, an eyepiece first lens (7) is a concave lens with a concave surface facing the image side, an eyepiece second lens (8) is a concave lens with a concave surface facing the object side, the eyepiece third lens (9) and an eyepiece fourth lens (10) form a cemented lens, the eyepiece third lens (9) is a biconvex lens, the eyepiece fourth lens (10) is a concave lens with a concave surface facing the object side, and an eyepiece fifth lens (11) is a convex lens with a convex surface facing the object side.
2. A telescope optical system according to claim 1, wherein: the center thickness of the first lens (1) of the objective lens is 7.2mm, the curvature radius of the object side is 104.95mm, the curvature radius of the image side is-972.7 mm, and the contour diameter is 57.5mm; the center thickness of the objective lens second lens (2) is 9mm, the curvature radius of the object side is 90.16mm, the curvature radius of the image side is-207 mm, and the contour diameter is 56mm; the center thickness of the third lens (3) of the objective lens is 4.2mm, the curvature radius of the object side is-207 mm, the curvature radius of the image side is 207mm, and the contour diameter is 56mm; the center thickness of the focusing lens (4) is 3mm, the curvature radius of the object side is 87.9mm, the curvature radius of the image side is 40.93mm, and the contour diameter is 30mm; the center thickness of the eyepiece first lens (7) is 2.1mm, the object side plane, the image side curvature radius is 23.88mm, and the contour diameter is 18mm; the center thickness of the eyepiece second lens (8) is 5mm, the curvature radius of the object side is-28.71 mm, the curvature radius of the image side is-16.52 mm, and the contour diameter is 25mm; the center thickness of the eyepiece third lens (9) is 9.1mm, the object side curvature radius is 57.54mm, the image side curvature radius is-16.52 mm, and the contour diameter is 25mm; the center thickness of the eyepiece fourth lens (10) is 2.1mm, the object side curvature radius is-16.52 mm, the image side curvature radius is-84.33 mm, and the contour diameter is 25mm; the eyepiece fifth lens (11) has a center thickness of 5.8mm, an object side radius of curvature of 22.18mm, an image side radius of curvature of-304.8 mm, and a contour diameter of 25mm.
3. A telescope optical system according to claim 1, wherein: the total length from the object side of the first lens (1) to the image side of the fifth lens (11) of the eyepiece is 168.15mm, the distance between the first lens (1) and the second lens (2) of the objective is 0.5mm along the optical axis direction, the distance between the third lens (3) of the eyepiece and the focusing lens (4) is 58.01mm, the distance between the focusing lens (4) and the roof prism (5) is 20mm, the distance between the half pentaprism (6) and the first lens (7) of the eyepiece is 2.81mm, the distance between the first lens (7) of the eyepiece and the second lens (8) of the eyepiece is 11.51mm, the distance between the second lens (8) of the eyepiece and the third lens (9) of the eyepiece is 0.3mm, and the distance between the fourth lens (10) of the eyepiece and the fifth lens (11) of the eyepiece is 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311076515.5A CN116990954B (en) | 2023-08-25 | 2023-08-25 | Telescope optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311076515.5A CN116990954B (en) | 2023-08-25 | 2023-08-25 | Telescope optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116990954A true CN116990954A (en) | 2023-11-03 |
| CN116990954B CN116990954B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311076515.5A Active CN116990954B (en) | 2023-08-25 | 2023-08-25 | Telescope optical system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918902A (en) * | 2017-05-05 | 2017-07-04 | 昆明朗菱光电仪器有限公司 | A kind of flat field telescopic optical system |
| CN206741080U (en) * | 2017-05-05 | 2017-12-12 | 昆明朗菱光电仪器有限公司 | A kind of flat field telescopic optical system |
| CN207586535U (en) * | 2017-12-01 | 2018-07-06 | 昆明朗特光学仪器有限公司 | A kind of good telescopic optical system of flat field effect |
| JP2020514838A (en) * | 2016-12-23 | 2020-05-21 | 重慶海藍川馬光電科技有限公司Ｃｈｏｎｇｑｉｎｇ Ｈｙｌｏｎ Ｃｏ．，Ｌｔｄ． | Compound prism used in multifunctional telescope and its binocular optical system |
| CN114442304A (en) * | 2021-12-27 | 2022-05-06 | 湖北华中光电科技有限公司 | Prism telescope optical system with large exit pupil diameter |
| CN116560065A (en) * | 2023-07-10 | 2023-08-08 | 云南汉瑞光学仪器有限公司 | Large-view-field telescope optical system |
-
2023
- 2023-08-25 CN CN202311076515.5A patent/CN116990954B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020514838A (en) * | 2016-12-23 | 2020-05-21 | 重慶海藍川馬光電科技有限公司Ｃｈｏｎｇｑｉｎｇ Ｈｙｌｏｎ Ｃｏ．，Ｌｔｄ． | Compound prism used in multifunctional telescope and its binocular optical system |
| CN106918902A (en) * | 2017-05-05 | 2017-07-04 | 昆明朗菱光电仪器有限公司 | A kind of flat field telescopic optical system |
| CN206741080U (en) * | 2017-05-05 | 2017-12-12 | 昆明朗菱光电仪器有限公司 | A kind of flat field telescopic optical system |
| CN207586535U (en) * | 2017-12-01 | 2018-07-06 | 昆明朗特光学仪器有限公司 | A kind of good telescopic optical system of flat field effect |
| CN114442304A (en) * | 2021-12-27 | 2022-05-06 | 湖北华中光电科技有限公司 | Prism telescope optical system with large exit pupil diameter |
| CN116560065A (en) * | 2023-07-10 | 2023-08-08 | 云南汉瑞光学仪器有限公司 | Large-view-field telescope optical system |
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| Publication number | Publication date |
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| CN116990954B (en) | 2024-03-19 |
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