Grating technology is an advanced technology based on the principle of optics, which mainly involves grating, an optical device consisting of a large number of parallel slits of equal width and equal spacing.

Definition and Classification of Optical Gratings

• Definition: A grating is an optical device consisting of a large number of parallel slits of equal width and spacing. Generally used grating is engraved on the glass sheet made of a large number of parallel scores, scores for the light-impermeable part, the smooth part between the two scores can be light transmission, equivalent to a slit.

• Classification: According to the different production methods and application areas, grating can be divided into transmission grating and reflection grating. Transmission gratings use transmitted light to diffract, while reflection gratings use reflected light to diffract.

Operating Principle of Optical Gratings

The principle of operation of a light grating is based primarily on the principle of multi-seam diffraction, which causes light to be dispersed (broken down into a spectrum). When monochromatic parallel light passes through each slit of a grating, diffraction occurs, and at the same time the light between the slits interferes, forming a pattern with wide dark stripes and thin bright stripes, and these bright stripes are called spectral lines. The position of the spectral lines varies with the wavelength, so after the complex color light passes through the grating, the spectral lines of different wavelengths will appear in different positions to form a spectrum.

Application scope of optical encoder

Industrial automation and production line safety: In industries such as machine building, new energy, photovoltaics, lithium-ion, and automotive manufacturing, light barriers are used to monitor and protect line workers from collisions with high-speed machines.

Robot operation: In robot operation areas, optical encoders are used to ensure that robots work in a safe operating environment while protecting those around them.

Displacement, Velocity and Surface Profile Measurement: Optical encoder sensors are used to measure linear displacement, angular displacement, velocity, acceleration and surface profile of objects and have important applications in the machine industry, motion control and automation.