SU1464132A1 - Apparatus for checking a lens - Google Patents

Abstract

The invention relates to optical instrumentation, increases productivity and reduces the size of a device designed to control lenses. The device contains an optical block between the controlled lens 21 and the projection screen 8, executed in the form of a truncated pyramid 5, with reflecting edges of which the mirrors 4.6 are optically coupled, while the mirrors 6 are optically coupled to the screen 8 through the reflecting mirror 7 and mirrors 4 are optically coupled through a controlled lens 21 to the angular worlds of the test object 3. The central world of the test object is associated with a translucent screen 8 through the lens 21 and a system of mirrors 9, 10, 11 of the optical unit. When controlling the lens 21 in the corresponding areas of the light screen 8, a group of images of the world of the test object 3 is obtained. f-ly, 3 ill. h 1 i (L N9

Description

 -Q 1

The invention relates to an optical instrument, specifically, to an apparatus for the visual control of photographic and projection lenses.

The purpose of the invention is to increase productivity and reduce size.

Fig. 1 shows the optical design of the deviceJ in Fig. 2 - device, general view; in fig. 3 is a view A of FIG. 2

The device contains an illuminator 1 with a condenser 2 and a test object 3 with stroke worlds, one of which is located in the center, and the remaining four are used in J g and 3 in the corners of the floor.

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illuminated by illuminator 1. The images of the four corner worlds 16, 17 and 18, 19 located in the corners of the test object 3 are transmitted to the mirrors 4 and the reflecting faces of the prism 5, and then the H / L screen 8 is projected through the mirrors 6 and the reflecting mirror 7. Mirrors 4 and the reflecting faces of the pyramid 5, as well as mirrors 6, are angled to each other in such a way that pairs of corner worlds 5, 6 and d, 3 are projected onto sections 16, 17 and 18, 19 of screen 8 as two pairs images 5, g and g-, e. The image of the central world is projected by the lens 21 on the screen 8 through the hole e of the pyramid 5 and the system of mirrors 9-11 on the section 15, Control

The device also contains an optical

a block consisting of mirrors 4, optical-20 lens 21 is produced with full

ki, conjugated with the corresponding edges of the truncated pyramid 5, in the swarm there is a hole e along the axis

Priramida 5 is located along. the optical axis of the device, the axis of the hole being aligned with the optical axis of the device. Reflecting gran pyramids 5 are optically coupled through deflecting mirrors 6 arranged at an angle to each other and reflecting mirror 7 with a projection screen 8. The tacklé optical unit contains an additional mirror 9 located behind the truncated pyramid 5 at an angle to the optical axis and optically conjugated through the mirrors 10 and 11 with a projection screen 8..

The projection screen 8 is made about light and 1 is separated by opaque lines 12–14 into five sections 15–19, with a pair of sections 16 and 17 located symmetrically to the other pair 18 and 19 relative to line 13.

A forming optical unit with optical systems is mounted on the housing 20.

The device works as follows.

The tested lens 21 (or optical unit) is exposed on the distance finger for a minimum final distance and is placed on a table (not shown) of the device.

Test object 3 installed in

the focal plane of the lens 21, under

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illuminated by illuminator 1. The images of the four corner worlds 16, 17 and 18, 19 located in the corners of the test object 3 are transmitted to the mirrors 4 and the reflecting faces of the prism 5, and then the H / L screen 8 is projected through the mirrors 6 and the reflecting mirror 7. Mirrors 4 and the reflecting faces of the pyramid 5, as well as mirrors 6, are angled to each other in such a way that pairs of corner worlds 5, 6 and d, 3 are projected onto sections 16, 17 and 18, 19 of screen 8 as two pairs images 5, g and g-, e. The image of the central world is projected by the lens 21 on the screen 8 through the hole e of the pyramid 5 and the system of mirrors 9-11 on the section 15, Control

ten

15

five

5 o

Q

0

five

opening its diaphragm by analyzing the images of the world obtained on the screen 8.

Invention Formula

Claims (2)

1. A device for controlling a lens, containing an illuminator mounted along the optical axis, a test object with a central and angular worlds located in the focal plane of the lens, and a projection screen, characterized in that, in order to increase productivity and reduce dimensions, the projection screen is arranged in front of a screen with an optical unit made in the form of a truncated pyramid with reflecting edges, two mirrors at an angle to each other, optically coupled through a reflecting mirror with a screen and with corresponding reflective edges of the truncated pyramid, optically conjugated through corresponding mirrors with angular worlds, as well as an additional reflecting mirror located on the optical axis of the lens, optically conjugated through a system of mirrors with a screen, and through holes made in the truncated pyramid with a central world. 2. The device according to claim 1, of which it is. so that the screen you -. full of translucent. View / I -eight J -17