All Optical Encoders include the same main components: a light source, a photodetector, and a multi slit disc. The light source, typically an LED, and the photodetector are placed on the opposite sides of the slit disk. As the disk rotates, the disk becomes transparent periodically as the slits of the disk line up along the light beam path. The encoder then converts these periodic light pulses into electrical pulses, which are then transmitted to a motion control system that feeds to the output channels. By knowing the distance between adjacent slits, the Optical Encoder’s output channels provide data on the measured signals' count, direction, and speed.
Optical Encoders are commonly used for robotics, medical and lab equipment, CNC machining, and a variety of other applications involving motion controls. The encoders can also be easily altered to provide desired application capabilities.
The accuracy of encoders is measured in arcseconds and varies for each type. Although Optical Encoders are always considered reliable, precise, and accurate devices, careless mistakes can degrade their accuracy through several error sources.
Optical Encoders offer better accuracy and higher resolution than magnetic encoder competitors, and they can be used in environments with strong magnetic fields. They are also highly immune to electrical interference from eddy currents, making them an excellent choice for electric circuits.
The cost of an Optical Encoder is highly dependent on the product’s size. The resolution and precision of an Optical Encoder rely on the detail of the slit disc. A larger disc means a larger machine, since these encoders offer higher precision they will therefore come at a higher price.
There are 15 different Optical Encoders from suppliers and manufacturers listed in this category. In just a few clicks you can compare different Optical Encoders with each other and get an accurate quote based on your needs and specifications. Please note that the prices of Optical Encoders vary significantly for different products based on various factors including technical parameters, features, brand name, etc. Please contact suppliers directly to inquire about the details and accurate pricing information for any product model. Simply navigate to the product page of interest and use the orange button to directly reach out to the respective supplier with one click.
Did You know?
Optical encoder is a transducer that accurately measures rotary motion. In a typical optical encoder a coded disk with alternating opaque and transparent areas acts as the tracking mechanism for the rotational position of the shaft it is attached to. A light source and a sensor situated on the opposite sides of the rotating disk count the steps the rotating disk makes as it sequentially allows the light to be recorded as the open areas line up on the path between the light source and the detector. The signal generated from the detector is then used as a feedback system for determining the position, direction and speed for the motion. Depending on the number of divisions on the coded disk, optical encoders can provide very high accuracies down to the 10th of a degree. Combined with a high-pitch driving shafts these accuracies translate to excellent precision in linear motion. As a result of their simplicity and precision Optical Encoders are most frequently used in robotics. As the robotics field grows steadily towards automation, encoders have played a larger role than ever in meeting the data requirements of the industry. Common robotics applications include automated guided vehicles (AGVs), automated assembling, automated mobile robots, and servo motors. These are projects you hear about in everyday life, manufacturing machines, medical devices, and even the Mars Rovers! Optical Encoders are the most common encoders used in robotics because of their unmatched precision in incremental and absolute measurements. They will continue to assist in innovating modern robotics, providing useful feedback and data to be used in further experimentation and development.