This is a 43-209 rectangular diffraction grating, sourced from the renowned optical components vendor, Edmund Optics. The grating, which measures 12.5 x 25 x 9.5 mm, is made of soda lime float glass, known for its high transparency and durability.
The grating features a reflective ruled design with 1200 grooves per millimeter, designed to disperse light into its spectral components. The blaze wavelength is 750 nm, and the blaze angle is 26.73 degrees, optimizing the grating's efficiency at this wavelength.
The grating's coating is bare aluminum, which provides high reflectivity across a wide range of wavelengths. The grating is designed to be used in the first order, and the grooves are on the front side of the grating.
This grating is in stock and available for immediate purchase. For more information, you can refer to the vendor's website through the provided weblink.