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Sharp Cut Filters

Sharp cut filters include 15 types, ranging from L-37 to R-66. The L, Y, O and R symbols represent Colorless, Yellow, Orange, and Red tones of filter color respectively. The numerals used to classify the glass types indicates 1/10 the corresponding transition wavelength.

Since the filters L-42 to R-68 are of "striking glass", the spectral characteristics of the filters will vary even if the striking temperature is controlled.

According to the Japanese Industrial Standard JIS B 7113 "Sharp cut filters" are defined as "Filters that cut off as much as possible of the wavelength light shorter than a specific wavelength, while transmitting as much of longer wavelength light as possible, within a wavelength range of 350nm to 800nm."

These Filter Types are generally used in Photography Applications, and are available in 2.5mm thickness.

Colorless Yellow Orange Red
L-37
L-38
L-39
L-40
L-42
370nm
380nm
390nm
400nm
420nm
Y-44
Y-46
Y-48
Y-50
Y-52
440nm
460nm
480nm
500nm
520nm
O-54
O-56
O-58
540nm
560nm
580nm
R-60
R-62
R-64
R-66
R-68
600nm
620nm
640nm
660nm
680nm