This is the GR13-1210, a Blazed Ruled Reflective Grating from Thorlabs, designed for use in the near-infrared spectrum. The grating is rectangular in shape, with dimensions of 12.7 x 12.7 x 6 mm, making it suitable for a variety of optical applications.
The grating is made from soda lime glass, a material known for its excellent optical properties and durability. It has a blaze wavelength of 1000 nm, which is the wavelength at which it is most efficient. The grating has 1200 grooves per millimeter, which contributes to its high dispersion of 0.67.
The GR13-1210 is coated with a specialized coating (tho gr13-1210) on the front side, which enhances its performance in the near-infrared spectrum. The grating is designed to be used in the first order, and it has a blaze angle of 36.8667 degrees.
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