SU369533A1 - VISING SYSTEM FOR CERTIFICATION OF PHOTOGRAMMETRIC CAMERAS - Google Patents

Description

one

This invention relates to reference optical instruments.

Known sighting systems for certification of photogrammetric cameras contain .1, a double-image microscope objective, the front part of which serves as a target sight lens, a beam-splitting prism system, a focusing prism of the tube, its flat mirror, a grid with a bisector, a wrapping lens system, and a dual-image microscope system combined with a sighting tube with a common beam-splitting mirror and an eye-piece.

To simplify the search and precise installation in the field of view of the sighting system of Schtrich images of the compressed skins and the entrance pupil of the objective of the camera being certified in the proposed system on the entire diameter of the beam splitter mirror is made mirror-reflecting nose, and the mirror is installed with the possibility of turning around its symmetry axis by the angle of the order 90 °

The drawing shows a schematic diagram of the sighting system and its position relative to the turntable 1 with guide carriages 2, 3 and an autocollimator that simultaneously performs the functions of the illuminator 4. On the turntable, the camera under study 5 is strengthened with a piece of cloth 6 located in its picture plane.

The target optical system includes a tube lens 7, which builds an image of a sighted scale 6 computed scale, a cube-prism 8 with a beam-splitting coating, a fixed (focusing) rectangular prism with a roof 9, a flat mirror 10 and a grid with a bisector 11, in the plane of which The image of the scribe is formed. This is followed by a rectangular prism 12 and a wrapping lens system 13, which transfer the image of the grid 11 and the sighted schtrich into the focal plane of the eyeglass 14. A switchable beam-splitting mirror 15 is installed in front of the eyelet. It has a mirror-reflecting strip.

The objective lens 7 is the first component of a dual-image microscope objective. The second component of the microscope objective is a system of glued lenses 16. Between the 7 m 16 components is placed one of the rectangular prisms that make up the cube-prism block 8. The front focus of the lens (7, 16) is aligned with the axis of rotation of the table 1. The microscope circuit contains , glued from two blocks 17 and 18 and having a beam splitting in the plane of gluing. Behind the pentaprism are the lenses 19 and the rectangular prism 20, which build an image of the entrance pupil of the photographic lens in the focal plane of the ocular 14.

When certifying photogrammetric cameras, the focusing prism of the pipe is moved so that in the plane of the grid I the compressed scale bar is shown without parallax. By rotating the camera and its linear movements relative to the axis of the limb while simultaneously observing the sighting system in the ocular of the eye, the image of the sight to be aligned with the pipe cutter is eliminated and the doubling of the image of the pupil of the photographic lens, which occurs in the direction perpendicular to the axis of rotation of the limb, is eliminated. For asymmetric pupils, doubling of the transverse diameter image, which characterizes the greatest width of the pupil, is eliminated.

At the stage of searching for the image of the stroke of the compressed scale in the field of view of the sighting system, the specularly reflecting strip of the beam-splitting mirror 15 is set in a position perpendicular to the axis of rotation of the limb. For sighting at the stage of precise installation of the camera, the beam-splitting mirror is rotated 90 °.

At the same time, the microscope is aimed precisely at the middle of a round or asymmetrical pupil and combines the images of the bar of the compressed scale with the pipe's bisector.

Subject invention

Vision system for certifying photogrammetric cameras containing a lens

a dual-image microscope, the front part of which is the lens of the sighting tube, a beam-splitting system, a focusing prism of the tube, its flat mirror, a grid with a bisector that wraps the lens

a dual-image microscope system and system, combined with a sighting tube with a common beam-splitting mirror and an ocular, characterized in that, in order to simplify the search and ensure accurate installation

in the field of view of the sighting system of images of the line of the computed scale and the entrance pupil of the lens of the camera being certified, a specularly reflecting strip is made on the entire diameter of the beam-splitting mirror, and

the mirror is installed with the possibility of rotation around its axis of symmetry at an angle of about 90 °.

13 18. ft-e / /// yy I Ij / y //// /// 1 (/// 7