![]() In this case the blaze angle is chosen such that the angle of the desired diffraction order coincides with the angle of the beam refracted at the grating material. ![]() Like every optical grating, a blazed grating has a constant line spacing d Blazed transmission grating īlazed gratings can also be realized as transmission gratings. This surface forms the left side of each grating tooth shown in the figure. The apparently optimal blaze profile would incorporate the reflective surface inclined at an angle of 38 relative to horizontal. ![]() The direction in which maximum efficiency is achieved is called the blaze angle and is the third crucial characteristic of a blazed grating directly depending on blaze wavelength and diffraction order. According to the grating equation, the only solutions are m 0 and m 1, and the 1 st order is diffracted at 22 (blue rays). It is typically used for analyzing the spectrum or measuring the wavelength of electromagnetic waves, particularly in or near the visible part of the spectrum. Since this condition can only exactly be achieved for one wavelength, it is specified for which blaze wavelength the grating is optimized (or blazed). 19,048 9,418 Definition/Summary A diffraction grating is formed by an evenly spaced series of lines, slits, or other periodic array of reflective or transmissive elements. ![]() For this purpose, maximum optical power is concentrated in the desired diffraction order while the residual power in the other orders (particularly the zeroth) is minimized. It is optimized to achieve maximum grating efficiency in a given diffraction order. A blazed grating – also called echelette grating (from French échelle = ladder) – is a special type of diffraction grating. ![]()
0 Comments
Leave a Reply. |