This is the GR13-0608 rectangular diffraction grating from Thorlabs, a leading vendor in the optical industry. Measuring 12.7 mm in width, 12.7 mm in height, and 6 mm in depth, this grating is made of soda lime glass, a material known for its excellent optical clarity and durability.
The grating features 600 grooves per millimeter, designed for use in the near-infrared region with a blaze wavelength of 750 nanometers. The blaze angle is 13 degrees, which contributes to a high efficiency of light diffraction. The grating's dispersion is 1.62, indicating a good ability to separate different wavelengths of light.
The coating on the front surface of the grating is specifically designed for this product (tho gr13-0608), enhancing its performance and durability. The grating is designed to be used in the first order (-1), and the grating side is the front side.
For more information, including pricing and availability, please refer to the vendor's website at https://www.thorlabs.com/thorproduct.cfm?partnumber=GR13-0608. The link has been verified and the product is currently in stock.