Air medium split two-direction right-angle head

Abstract

The invention provides an air medium split two-direction right-angle head which comprises a hollow rectangular casing, wherein a transmission light through hole, a reflect light through hole and an incident light through hole are respectively arranged on three adjacent lateral faces of the casing and are respectively in elastic connection with a dustproof cover. The upper end face and the lower end face of the casing are parallel and are respectively connected with an upper top plate and a lower bottom plate through screws, and the parallelism between the upper end face and the lower end face of the casing is no larger than 2''. A light reflecting mirror I and a light reflecting mirror II are both in triangular prism shapes and are respectively fixed on two triangular light reflecting mirror installation plates which are fixed on the lower bottom plate to enable the included angle formed by the light reflecting mirror I and the light reflecting mirror II to be 45 degrees. A light reflecting mirror transmission light through hole is arranged in the middle of the light reflecting mirror I and aligns to the transmission light through hole. According to the air medium split two-direction right-angle head, media between the two reflecting surfaces are air, so that long-light-path light energy loss in glass is avoided, a large light transmission caliber can be manufactured, and targets can be easily captured. In addition, the air medium split two-direction right-angle head is convenient to use.

Description

technical field [0001] The invention belongs to the field of measuring geometric quantities and angles, and relates to a two-way right-angle head, in particular to an air medium split-type two-way right-angle head. Background technique [0002] The two-way right-angle head, also known as the zero-pitch right-angle head, is an important accessory for photoelectric goniometers such as collimating telescopes or photoelectric autocollimators. The two-way right-angle head bends the optical line of sight by 90°, and is used to establish mutually perpendicular optical lines of sight, or an optical plane perpendicular to the optical line of sight, and several optical planes parallel to each other. The commonly used two-way right-angle head adopts an integral structure, which is made of a glass pentaprism 13 and a glass wedge mirror 12 glued on its semi-transparent and semi-reverse surface. The structure and schematic diagram of the integral glass two-way right-angle head are shown ...

AI Technical Summary

Problems solved by technology

Since the glass pentaprism is made of a whole piece of glass, the two reflective surfaces must not only ensure a 45° angle, but also ensure that they are perpendicular to the same plane, which is difficult to achieve in terms of technology, and once coated, it cannot be repaired

Therefore, the parallelism between the outgoing light and the incident light of the general glass pentaprism in the vertical plane is often "angle-minute" level, and it is difficult to achieve a precise 90° rotation angle due to the influence of "pyramidal aberration".

[0006] (3) Since the glass pentaprism is glued to the wedge mirror, the two glass surfaces are difficult to be strictly parallel, and the direct outgoing light will be deflected or translated, which will affect the measurement accuracy

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