SU1365025A1 - Telescopic reflector - Google Patents

Abstract

The invention relates to optical instrumentation, specifically to adjustment devices for alignment and control of optical devices. The purpose of the invention is the expansion of technological adaptability while maintaining the invariance of the direction of the reflected beams. The optical reflector system consists of two equally focused lenses I and 2, chalk, with which a rectangular prism 3 and right) flax prism 5 are placed along the beam, ensuring that the directions of the incident and reflected beams are kept the same in two mutually perpendicular planes. A diamond prism 6 shifts the luminous flux incident on it parallel to itself and directs it to lens I. An inverting system 4 installed between prisms 3 and 5 transfers the beam focus point of lens I to the front focal plane of lens 2. A parallel beam of rays from the lens 2 is shifted by a diamond prism 7 by an amount equal to the magnitude of its refracting face. The wrapping system 4 is made of symmetrical components 8 and 9 with an IO diaphragm between them. 1 hp f-ly, 1 ill., 1 tab. / SL Complaint to SP

Description

The invention relates to optical instrumentation, namely to alignment devices for alignment and control of optical devices.

The purpose of the invention is to expand the technological adaptability while maintaining the invariance of the direction of the reflected beams by changing the distance between the incoming and outgoing beams.

The drawing shows the optical layout of the device.

The telescopic reflector with a magnification equal to one is made in the form of two equally focal lenses 1 and 2, between which a rectangular prism 3, a wrapping system 4 and a rectangular prism 5 with a roof are installed along the beam, and a diamond prism is installed in front of the lenses 1 and 2 6 and 7 with the possibility of rotation around the optical axes of the lenses. The reversing system 4 is made in the form of two symmetrical components 8 and 9, in the center between which there is an aperture stop 10.

In this case, the distance Xj from the focal plane of the objective 1 (2) to the plane of the entrance (exit) pupil is equal to

 rn

2 - 7 2

 about. with

where f is the focal distance of lenses 1 and 2j

0 with a focal length of components 8 and 9 of the inverting system 4;

/ is the distance between components 8 and 9.,

Telescopic reflector works as follows.

The light beam passes through a parallel beam through a rhombus prism 6, which shifts it parallel to itself by an amount equal to the size of the refracting face of rhombus prism 6, and directs it to lens 1, which focuses the stream in its back focal plane. The focusing point is transferred by the inverting system 4 to the front focal plane of the lens 2. In this case, the prisms 3 and 5 fracture the optical axis on the IBO without disturbing the invariance of the direction of the reflected beam. Exit — schI from lens 2; a parallel beam of rays is shifted by a rhombus-prism 7

by an amount equal to the size of the refractive edge of the rhombus prism 7,

The engagement of the rhombus prism 6 and 7 around the optical axes of the lenses 1 and 2 allows changing the center distance of the incoming and outgoing beams in the range from a to b le, cs Using a rectangular prism 3 and a rectangular prim 1 1 5 with a roof keeps the direction of the incident and reflected beams the same in two mutually perpendicular planes.

The drawing indicates the following design parameters:

A is the distance from the main plane of the lens to the optical axis of the wrapping system;

B — distance between optical axes of lenses I and 2 (base of reflector without rhombus prism); C is the distance from the main plane of the lens to the refracting face of the corresponding diamond prism;

D is the distance between the refractive faces of myrhombus prisms; E is the value of the refractive edge of rhombus prisms. Then

2А + В ,, + d, (2) С + D + Е f ;, -y fifCflc- |) (3)

L ,, „В - 2Е, ,, В + 2Е.

The sum of the expressions (4) and (5), having (4) (5)

40

eat

B -5- (s ,, +,).

(6)

Subtracting expression (5) from expression (4), we have

 45

E-t- (b, a, c b b „„ „).

(7)

If the angle of inclination of the reflecting face of rhomb prisms 6 and 7 is 45, then

50

D b „,„

(AT)

According to the above expressions (2) - (8), the basic dimensions, 1e, are determined. Let's accept L 40 mm; B, „, 400 mm.

Togzha from the expression (8) D 40 mm, from the compression (6) B 220 mm, from the expression (7) E 90 mm. For constructive reasons, d 20 mm is set.

Thus, “Bc. Lectures 1 and 2 and the compo- nent of the 8th wrap around systems 8 and 9 are equally focal; f f 110 mm.

Based on the dimensions of the lenses, we determine the dimensions of the prisms. Taking into account the path P of the beam n thicker than glass, expressions (2) and (3) take the form

2A + B 4. p 2fl -f, + j,

C (D + E) n

f + fiiff

 C6 f 7 - cc 9 J-, c

In the proposed example, the prisms are made of K8 glass. Using the above expressions, we calculate the overall dimensions of the telescopic reflector: A 97.65 mm; With 12.88 mm; X 100 mm.

The parameters of the lenses are shown in the table.

75.32

-44,358,41,5163К8

-121,593,171,6475ТФ1

0

five

0

five

Focal distance f 110 mm; relative distance 1: 4.5; Angle field of vision 2s 12.

Claims (2)

1. A telescopic reflector containing an optical system with a magnification equal to one, characterized in that, in order to expand technological adaptability while maintaining the invariance of the direction of the reflected beams, the optical system is designed as two equally focal lenses, between which a right-angle prism is mounted along the beam, a wrapping system and a rectangular prism with a roof and diamond lenses are installed in front of the lenses so that they can be rotated around the optical axes of the lenses. 2. The reflector according to claim 1, characterized in that the wrapping system is made up of two symmetrical components, in the center between which there is an aperture stop.