Laser distance measuring instrument

Abstract

The invention relates to a laser distance measuring instrument, which comprises a first laser emitter, a second laser emitter, a laser receiver, and a switch circuit module. The first laser emitter isused for emitting an alignment laser of a first wavelength. The second laser emitter is used for emitting a distance measuring laser of a second wavelength. The emission power of the first laser emitter is smaller than the emission power of the second laser emitter. The laser receiver is used for preventing the reflected light of the alignment laser from passing through. The reflected light of the distance measuring laser sequentially passes through a single-pass filter lens and a focusing lens to be received by a receiver device. The switch circuit module comprises two switches. The two switches are electrically connected with the first laser emitter and the second laser emitter respectively. A first shell is connected with a second shell to form a pistol type structure. The mechanical triggering components of the two switches are located at the connection part of the first shell and the second shell. According to the invention, two laser emitters are arranged, and are used for emitting the alignment laser and the distance measuring laser respectively. Therefore, the defect that the service life of one laser emitter is shortened due to the long-time working of the laser emitter can be avoided. The pistol type structure is convenient to operate.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a laser range finder. Background technique [0002] Laser can be used in many fields, such as using visible laser to measure the distance of the measured object, that is, laser range finder. Alignment is required before ranging. If the alignment is not good, it will affect the accuracy of ranging. Therefore, when using a laser rangefinder, more time is spent on alignment, and the ranging process is relatively short. The current laser rangefinder has only one laser transmitter, which is used for both alignment and distance measurement. Since the temperature of the semiconductor laser rises with the prolongation of the working time, the output optical power decreases with the rise of the temperature, and at the same time The rise in temperature causes the laser wavelength to red-shift, so long-term heavy load operation of the laser will easily lead to shortened measurement range an...

AI Technical Summary

Problems solved by technology

Alignment is required before ranging. If the alignment is not good, it will affect the accuracy of ranging. Therefore, when using a laser rangefinder, more time is spent on alignment, and the ranging process is relatively short.

The current laser rangefinder has only one laser transmitter, which is used for both alignment and distance measurement. Since the temperature of the semiconductor laser rises with the prolongation of the working time, the output optical power decreases with the rise of the temperature, and at the same time The temperature rise causes the laser wavelength to red shift, so the long-term heavy load operation of the laser will easily lead to shortening of the measurement range and measurement accuracy, and it will also easily shorten the service life of the laser

In addition, the current laser range finder still has the defects of large size and inconvenient operation.

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