To specify the OD blocking range for a bandpass filter you need two independent numbers, not one: the depth of rejection, given as optical density (OD), and the wavelength interval over which that rejection is guaranteed. The interval is set by your system rather than…
Engineers usually reach the question of how to calculate F-theta scan field size at one of two moments: when a marking field has to cover a part of known dimensions, or when a calculated field does not agree with the number printed on a lens…
Thermal lensing in germanium optics is the change in optical power that occurs when absorbed radiation heats a germanium element non-uniformly, creating a radial temperature gradient that is converted into a refractive index gradient through the material’s thermo-optic coefficient. The heated element behaves as if…
