Visible band range of 400-700nm, which is the color of the human eye can be. Xiamen infrared glass, such as green as 532nm, red light for 633nm, the difference between the two 100nm. In this range, the use of the lens, the peak demand for the coating center is very high, usually controlled by the offset in the 5nm. The shorter the wavelength, the higher the position accuracy of the center peak, such as ultraviolet 355nm and 266nm, the offset is less than 5nm. This is a very demanding test of coating equipment and processes. The company is a professional manufacturer of far infrared optical glass,
Infrared glass requirements of the infrared transmittance of the glass itself has a very, infrared glass with single crystal and polycrystal two, in the power switch cabinet, in contrast, is due to the long wave infrared optical film um, such as CO2 laser 10.6um (10600nm), infrared film 3-5um, 8-14um, the film is also very thick usually, the UM level, so the position accuracy of central peak are not high. The same peak drift 0.1um (100nm), in the visible light field is equivalent to the red green, film is definitely not qualified, but the same thing happened in the field of infrared light, the equivalent of 10.6um to 10.5um, through the maximum rate of no change (usually flat curve), only is the appearance of color change. Therefore, in the infrared film, because the film is very thick, the cumulative thickness difference may become large, resulting in color difference, however, the use of infrared light, but did not affect the use of. Usually this color difference appears in different batches of coating, in the same batch of coating color almost identical! If the customer needs to be consistent with the requirements of different batches of infrared film color, for the manufacturer, it will be a challenge. This requires additional control precision, virtually increase the cost of the product, resulting in the price increase, the appearance of the color of the pursuit of real performance without any help.