Rotary encoders are used as sensors for angle,position,speed and acceleration. We can offer incremental encoders and absolute encoders.
Absolute Encoder,Custom Encoder On Motor,Custom Optical Encoders,High Resolution Encoder Yuheng Optics Co., Ltd.(Changchun) , https://www.yhencoder.com
The Finnish-based company Ledil develops a selection of versatile and innovative semiconductor optical solutions including: reflectors; single and multiple lenses; light guides and customer-specific lenses.
These efficient, visually pleasing and mechanically well-engineered lenses are available in various sizes from miniature LEDs to the most powerful LEDs. These are also offered in a variety of illumination patterns such as spot, medium, wide, oval or side emissions.
Ledil works closely with global-leading LED manufacturers to ensure it remains at the forefront of LED technology, using cutting-edge equipment for its products. 
UK - Arrow Electronics ( http:// ) has broadened its lighting range available to UK and Northern European customers by signing a new agreement with geometrical optic specialists, Ledil ( http:// ).