Welcome to the OpenSimpleLIDAR wiki! This is simple enough DIY scanning laser rangefinder.
Article about it (in russian): https://geektimes.ru/post/275442/
Construction of this lidar is similar to Neato lidar or RPlidar.
This lidar is using triangulation method to measure distance to objects. Some more information about this method: https://sites.google.com/site/todddanko/home/webcam_laser_ranger
Lidar consist of two main parts: scanning head and base.
Scanning head consists of DIY plastic "disc", electronics, lens, laser module, slip ring module, some miscellaneous parts for fixture.
Electronics consists of STM32F32F303 microcontroller, ELIS-1024 linear image sensor, some miscellaneous parts, 2-layer PCB.
Lens is M12, f'=16mm. It's attached to PCB by special lens holder.
Laser module is cheap 780 nm laser module, placed to small tube (6 mm diameter).
Slip ring module is placed inside a hole in "disc". My module have 6 electric lines.
There is a paper encoder disc with printed marks undersides head's disc.
Base consists of plastic plate, brushed motor, ball bearing, encoder sensor, simple PCB with motor voltage regulator, 4 legs, some miscellaneous parts for fixture.
Ball bearing is used to attach scanning head to plastic plate.
Encoder sensor (reflection type) is used to calculate speed and position of head.