High-precision reference prism device for field work

Abstract

The invention discloses a high-precision reference prism device for field work. The prism comprises a prism base, wherein a V-shaped groove is formed in a front surface of the prism base, grooves areformed in the positions, located in the middle, of an inner wall of the V-shaped groove, rectangular tool withdrawal grooves are formed in the positions, located at connecting positions of two surfaces, of the inner wall of the V-shaped groove, and mounting supporting lugs are arranged at the top and the bottom of the prism base. The prism is advantaged in that an adjusting pressing plate, the V-shaped groove, a gluing counter bore and a gluing hole groove B are arranged, the effect that the prism can be stably used for a long time and is not easy to crack in a field severe environment is achieved, problems that when an existing reference prism is used in a severe field environment, the bonding strength of the prism cannot be kept stable in the environment with large temperature differenceand humidity difference, a moving thermal expansion space is not reserved for the prism, and the prism is prone to cracking and degumming and poor in stability after being used in the field for a long time are solved. The prism is suitable for high-precision reference prisms.

Description

technical field [0001] The invention relates to an optical aiming, in particular to a high-precision reference prism device for field work. Background technique [0002] The high-precision reference prism device is a commonly used optical reference, mainly as a high-precision true north reference or azimuth reference. The main parameter when used as a true north reference is the angle between its prism normal and true north. As The main parameter of the azimuth datum is the angle between its prism normal and the fixed azimuth. As the azimuth reference, the long-term stability of the normal position of the installed reference prism is a major technical indicator of the reference prism. Generally, the annual change is required to be less than 1", and the annual change of the high-precision reference prism is less than 0.5". The prism material in the prism is often used as optical glass. The characteristics of optical glass material are high light reflectivity, high rigidity, ...

AI Technical Summary

Problems solved by technology

However, in the field working environment, due to the large impact, temperature and humidity, the reference prism with this structure is prone to problems such as prism cracking, degumming or poor stability after being used for a period of time, causing such problems The main reason is that the bonding process between the prism and the titanium alloy is difficult to control. It is necessary to take into account the bonding strength to ensure long-term stability, and to reserve a certain thermal expansion space for the prism to prevent it from cracking and damage; at the same time, this The maintenance of the reference prism is inconvenient, and it is a one-time structural component. If the internal prism is damaged or loose, the entire assembly can only be completely scrapped, and it cannot be used after repeated disassembly. Therefore, many reference prisms that work in the field or under harsh conditions , because its stability is difficult to guarantee, so a shorter regular calibration cycle and maintenance cycle are formulated, which increases the workload of additional calibration of the reference prism, resulting in a decrease in equipment use efficiency

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