CN115728917A

CN115728917A - Telescope doubling optical system

Info

Publication number: CN115728917A
Application number: CN202211417938.4A
Authority: CN
Inventors: 聂王翔
Original assignee: Kunming Binrui Technology Co ltd
Current assignee: Kunming Binrui Technology Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-03
Anticipated expiration: 2042-11-14
Also published as: CN115728917B

Abstract

The invention provides a telescope doubling optical system, which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and is characterized in that: along optical axis direction has set gradually first lens, the second lens, the third lens, the fourth lens, the fifth lens, first lens are the convex lens that the convex surface faces left, the second lens are cemented lens, the left side of second lens is the convex surface, the right side of second lens is the concave surface, the third lens are cemented lens, the left side of third lens is the convex surface, the right side of third lens is the concave surface, the fourth lens are the falcate lens, the left side of fourth lens is the convex surface, the fifth lens left side is the concave surface, whole optical system's multiplying power is 5 times, the visual field is 7.

Description

Telescope doubling optical system

Technical Field

The invention relates to the technical field of optical lens manufacturing, in particular to a telescope doubling optical system.

Background

The multiplying power calculating method of the telescope is to divide the focal length of the objective lens by the focal length of the eyepiece lens, such as a 102/1000 type telescope, the focal length of the primary lens is 1000 mm, when the 10 mm focal length eyepiece is adopted, the multiplying power is 1000 ÷ 10=100 times, the telescope is an optical instrument for observing a remote object by using a lens or a reflector and other optical devices, light rays passing through the lens are refracted or reflected by a concave mirror to enter a small hole and be converged and imaged, and then are seen through a magnifying eyepiece.

However, with the development of society, more demands, such as the realization of the magnification change of the telescope optical system, are generated.

Disclosure of Invention

The invention aims to provide a telescope magnification increasing optical system, which realizes the change of the magnification of the telescope optical system by using a brand new design concept and design thought.

In order to achieve the purpose, the invention adopts the technical scheme that:

a telescope doubling optical system comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and is characterized in that: the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, wherein the first lens is a convex lens with a convex surface facing left, the second lens is a cemented lens, the left side of the second lens is a convex surface, the right side of the second lens is a concave surface, the third lens is a cemented lens, the left side of the third lens is a convex surface, the right side of the third lens is a concave surface, the fourth lens is a meniscus lens, the left side of the fourth lens is a convex surface, the left side of the fifth lens is a concave surface, the multiplying power of the whole optical system is 5 times, and the viewing field is 7 degrees.

As a further improvement of the invention, the first lens and the second lens form a front group, the focal length of which is 123.6mm, and the third lens, the fourth lens and the fifth lens form a rear group, the focal length of which is-25.29 mm.

As a further improvement of the present invention, the distance between the first lens and the second lens in the optical axis direction is 2.05mm, the distance between the second lens and the third lens in the optical axis direction is 32mm, the distance between the third lens and the fourth lens in the optical axis direction is 1.53mm, and the distance between the fourth lens and the fifth lens in the optical axis direction is 5.76mm.

As a further improvement of the invention, the left side curvature radius of the first lens is 58.16mm, the right side curvature radius is 200mm, and the center thickness is 12.62mm;

the left curvature radius of the second lens is 52.24mm, the curvature radius of the gluing surface is-704.7 mm, the right curvature radius is 55.34mm, and the center thickness is 18mm;

the left curvature radius of the third lens is 31.823mm, the curvature radius of a gluing surface is-50.58 mm, the right curvature radius is 16.218mm, and the center thickness is 10.01mm;

the left curvature radius of the fourth lens is 16.904mm, the right curvature radius of the fourth lens is 18.664mm, and the center thickness of the fourth lens is 3.24mm;

the curvature radius of the left side of the fifth lens is-17.7 mm, the curvature radius of the right side of the fifth lens is infinite, and the center thickness of the fifth lens is 1.8mm.

Has the advantages that:

the invention adopts the design concept of the optical system of the telescope and the integral design of the optical system of the telescope, and the multiplying power of the optical system of the telescope is realized by installing the multiplying power of the telescope in front of the objective lens of the telescope, for example, the multiplying power of the telescope is 8 times, and the multiplying power of the whole optical system is changed into 40 times after the multiplying power is installed.

Drawings

FIG. 1 is a light path diagram of the present invention;

FIG. 2 is a transverse fan view of the present invention;

FIG. 3 is an axial aberration diagram of the present invention;

FIG. 4 is a field curvature distortion diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A telescope doubling optical system comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5, and is characterized in that: the optical telescope comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5 which are sequentially arranged along an optical axis direction, wherein the first lens 1 is a convex lens with a convex surface facing left, the second lens 2 is a cemented lens, the left side of the second lens 2 is a convex surface, the right side of the second lens 2 is a concave surface, the third lens 3 is a cemented lens, the left side of the third lens 3 is a convex surface, the right side of the third lens 3 is a concave surface, the fourth lens 4 is a meniscus lens, the left side of the fourth lens 4 is a convex surface, the left side of the fifth lens 5 is a concave surface, the first lens 1 and the second lens 2 form a front group with a focal length of 123.6mm, the third lens 3, the fourth lens 4 and the fifth lens 5 form a rear group with a focal length of-25.29 mm, the magnification of the whole optical system is 5 times, the field of view is 7 degrees, the magnification increasing lens is connected to an objective lens according to achieve the change of the magnification, such as the original magnification of 6, the whole optical telescope is changed into a larger magnification increasing telescope.

Further, first lens 1 and second lens 2 are 2.05mm along the distance between the optical axis direction, second lens 2 and third lens 3 are 32mm along the distance between the optical axis direction, third lens 3 and fourth lens 4 are 1.53mm along the distance between the optical axis direction, fourth lens 4 and fifth lens 5 are 5.76mm along the distance between the optical axis direction, utilize compact optical design principle, whole light path is shorter, install convenient and the convenient to carry's principle of accomodating after the mechanical structure additional.

Further, the left side curvature radius of the first lens 1 is 58.16mm, the right side curvature radius is 200mm, and the center thickness is 12.62mm; the left curvature radius of the second lens 2 is 52.24mm, the curvature radius of a gluing surface is-704.7 mm, the right curvature radius is 55.34mm, and the center thickness is 18mm; the left curvature radius of the third lens 3 is 31.823mm, the curvature radius of a gluing surface is-50.58 mm, the right curvature radius is 16.218mm, and the center thickness is 10.01mm; the radius of curvature of the left side of the fourth lens 4 is 16.904mm, the radius of curvature of the right side of the fourth lens 4 is 18.664mm, and the center thickness of the fourth lens is 3.24mm; the curvature radius of the left side of the fifth lens 5 is-17.7 mm, the curvature radius of the right side of the fifth lens is infinite, and the center thickness of the fifth lens is 1.8mm.

The optical system parameters are as follows:

the points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A telescope doubling optical system comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and is characterized in that: the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, wherein the first lens is a convex lens with a convex surface facing left, the second lens is a cemented lens, the left side of the second lens is a convex surface, the right side of the second lens is a concave surface, the third lens is a cemented lens, the left side of the third lens is a convex surface, the right side of the third lens is a concave surface, the fourth lens is a meniscus lens, the left side of the fourth lens is a convex surface, the left side of the fifth lens is a concave surface, the multiplying power of the whole optical system is 5 times, and the viewing field is 7 degrees.

2. The telescopic magnification-increasing optical system according to claim 1, characterized in that: the first lens and the second lens form a front group, the focal length of the front group is 123.6mm, and the third lens, the fourth lens and the fifth lens form a rear group, the focal length of the rear group is-25.29 mm.

3. The telescopic doubling optical system of claim 1, wherein: the distance between the first lens and the second lens along the optical axis direction is 2.05mm, the distance between the second lens and the third lens along the optical axis direction is 32mm, the distance between the third lens and the fourth lens along the optical axis direction is 1.53mm, and the distance between the fourth lens and the fifth lens along the optical axis direction is 5.76mm.

4. A telescope doubling optical system according to any of claims 1 to 3, characterised in that: the left curvature radius of the first lens is 58.16mm, the right curvature radius of the first lens is 200mm, and the center thickness of the first lens is 12.62mm;