CN-121679884-B - Small-caliber large-view-field telescope optical system

Abstract

The invention belongs to the technical field of telescope manufacturing, and discloses a small-caliber large-view-field telescope optical system which is characterized in that an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing lens, a half-penta prism, a roof prism, an eyepiece first lens, an eyepiece second lens, an eyepiece third lens, an eyepiece fourth lens, an eyepiece fifth lens and an eyepiece sixth lens are sequentially arranged from an object side to an image side along an optical axis direction, and the optical system realizes a large view field of 6.7 degrees under the condition of 10 times.

Inventors

• WEN XUEJUN
• YANG XIANGYONG

Assignees

• 昆明朗菱光电仪器有限公司

Dates

Publication Date

20260508

Application Date

20260211

Claims (2)

1. 1. The small-caliber large-view-field telescope optical system is characterized in that an objective first lens (1), an objective second lens (2), an objective third lens (3), a focusing lens (4), a half-pentaprism (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) and an eyepiece sixth lens (12) are sequentially arranged from an object side to an image side along the optical axis direction; The lens system comprises an objective lens first lens (1) which is a plano-convex lens, a convex surface faces an object side, an objective lens second lens (2) and an objective lens third lens (3) which form a cemented lens, 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 concave-convex lens, the convex surface faces the object side, an eyepiece first lens (7) and an eyepiece second lens (8) form a cemented lens, the eyepiece first lens (7) is a biconcave lens, the eyepiece second lens (8) is a concave-convex lens, the convex surface faces the object side, an eyepiece third lens (9) is a concave-convex lens, the concave surface faces the object side, an eyepiece fourth lens (10) and an eyepiece fifth lens (11) form a cemented lens, the eyepiece fourth lens (10) is a concave-convex lens, the convex surface faces the object side, the eyepiece fifth lens (11) is a biconvex lens, the sixth lens (12) is a concave-convex lens, and the convex surface faces the object side, and the optical system has optical power only more than 10 lenses; The object lens first lens (1) is characterized in that the object side curvature radius is 54.4mm, the image side is a plane, the center thickness is 3.5mm, glass H-FK61 and the contour diameter are adopted as materials, the object side curvature radius of the object lens second lens (2) is 40.77mm, the image side curvature radius is 156mm, the center thickness is 4.5mm, glass H-FK61 and the contour diameter are adopted as materials, 27mm, the object side curvature radius of the object lens third lens (3) is-156 mm, the image side curvature radius is-156 mm, the center thickness is 2mm, glass H-ZBaF and the contour diameter is 27mm, the object side curvature radius of the focusing lens (4) is 66.68mm, the image side curvature radius is-24.5 mm, the center thickness is 1.3mm, glass H-K9L and the contour diameter is 15mm; The first lens (7) of the ocular lens has an object side curvature radius of 31.7mm, an image side curvature radius of 11.69mm, a center thickness of 1.3mm, glass H-K9L, a contour diameter of 15mm, the second lens (8) of the ocular lens has an object side curvature radius of 11.69mm, an image side curvature radius of 18.27mm, a center thickness of 3mm, glass H-ZF4, a contour diameter of 15mm, an object side curvature radius of 42.8mm, an image side curvature radius of 16.46mm, a center thickness of 4.9mm, glass H-LaK A, a contour diameter of 23mm, an object side curvature radius of 142.36mm, an image side curvature radius of 19.75mm, a center thickness of 2mm, glass H-ZF62, a contour diameter of 23mm, an object side curvature radius of the fifth lens (11) has an object side curvature radius of 19.75mm, an image side curvature radius of 32.52mm, a center thickness of 7mm, a contour diameter of 5.5mm, a positive and a concave surface radius of 5.5mm, wherein the contour diameter of the fourth lens (10) of the ocular lens has an object side curvature radius of 142.36mm, the contour diameter of 5.23 mm, and the contour diameter of 5.5 mm.
2. 2. A small-caliber large-field telescope optical system according to claim 1, characterized in that the distance between the objective lens first lens (1) and the objective lens second lens (2) in the optical axis direction is 0.4mm, the distance between the objective lens third lens (3) and the focusing lens (4) is 21.5mm, the distance between the focusing lens (4) and the half pentaprism (5) is 15.5mm, the distance between the roof prism (6) and the eyepiece first lens (7) is 5mm, the distance between the eyepiece second lens (8) and the eyepiece third lens (9) is 8.98mm, the distance between the eyepiece third lens (9) and the eyepiece fourth lens (10) is 0.25mm, and the distance between the eyepiece fifth lens (11) and the eyepiece sixth lens (12) is 0.25mm.

Description

Small-caliber large-view-field telescope optical system Technical Field The invention relates to the technical field of telescope manufacturing, in particular to a small-caliber large-view-field telescope optical system. Background The telescope is the equipment of observing the distant object, and the development of telescope has a long history, and the prism structure that modern telescope adopted is usually Paul prism and roof prism, and the telescope that adopts Paul prism simple structure, the reliability is high, but the mirror body structure is great, and it is inconvenient to carry, along with roof prism's development, the telescope volume obviously reduces, and the structure is also more complicated, and the processing accuracy requires also corresponding promotion, has many small-bore telescopes in the prior art, but because optical design's is unreasonable, causes the visual field of whole telescope less, and the distortion is than great. Disclosure of Invention The invention aims to provide a small-caliber large-view-field telescope optical system so as to solve the problems in the background technology. In order to solve the technical problems, the invention provides a small-caliber large-view-field telescope optical system, which is characterized in that an objective lens first lens, an objective lens second lens, an objective lens third lens, a focusing lens, a half pentaprism, a roof prism, an ocular lens first lens, an ocular lens second lens, an ocular lens third lens, an ocular lens fourth lens, an ocular lens fifth lens and an ocular lens sixth 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 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 concave-convex lens, the convex surface faces to the object side, the first lens of the ocular lens and the second lens of the ocular lens form a cemented lens, the first lens of the ocular lens is a biconcave lens, the concave surface faces to the object side, the fourth lens of the ocular lens and the fifth lens of the ocular lens form a cemented lens, the fourth lens of the ocular lens is a concave-convex lens, the convex surface faces to the object side, the fifth lens of the ocular lens is a biconvex lens, and the sixth lens of the ocular lens is a concave-convex lens, and the optical system only has the above 10 lenses with optical power. According to the preferable technical scheme, the object side curvature radius of the first lens of the objective lens is 54.4mm, the image side is a plane, the center thickness is 3.5mm, glass H-FK61 is adopted as a material, the contour diameter is 27mm, the object side curvature radius of the second lens of the objective lens is 40.77mm, the image side curvature radius is 156mm, the center thickness is 4.5mm, glass H-FK61 is adopted as a material, the contour diameter is 27mm, the object side curvature radius of the third lens of the objective lens is-156 mm, the image side curvature radius is-156 mm, the center thickness is 2mm, glass H-ZBaF is adopted as a material, the contour diameter is 27mm, the focusing lens object side curvature radius is 66.68mm, the image side curvature radius is-24.5 mm, the center thickness is 1.3mm, glass H-K9L is adopted as a material, and the contour diameter is 15mm; The first lens of the ocular has an object side curvature radius of-31.7 mm, the image side curvature radius of-11.69 mm, the center thickness of 1.3mm, glass H-K9L, the contour diameter of 15mm, the second lens of the ocular has an object side curvature radius of 11.69mm, the image side curvature radius of-18.27 mm, the center thickness of 3mm, glass H-ZF4, the contour diameter of 15mm, the third lens of the ocular has an object side curvature radius of-42.8 mm, the image side curvature radius of 16.46mm, the center thickness of 4.9mm, the material of glass H-LaK A, the contour diameter of 23mm, the fourth lens of the ocular has an object side curvature radius of 142.36mm, the image side curvature radius of-19.75 mm, the center thickness of 2mm, glass H-ZF62, the contour diameter of 23mm, the fifth lens has an object side curvature radius of 19.75mm, the image side curvature radius of 32.52mm, the center thickness of 7mm, glass H-LaK A, the contour diameter of six lens of 5.246 mm, the contour diameter of positive and the concave surface of the lens of 5.5.5 mm, wherein the contour diameter of the fourth lens is represented by positive and the contour diameter of 3.5 mm. As a preferable technical scheme, a distance between the objective lens first lens and the objective lens second lens along the optical axis direction is 0.4mm, a distance between the objective lens thi