Color Filter Glass : Products & Services

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-66 are of "striking glass", the spectral characteristics of the filters will vary even if the striking temperature is controlled.

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.

Color Filter Glass : Sharp Cut Filter Data
print-friendly data tabledefinition of terms
Item / Filter Type Standard Value Color Specification (Standard illuminants A) Thickness Reflective Index Chemical Properties Thermal Properties Mechanical Properties Specific Gravity
λT (nm) Δλ (nm) TH (%) x y mm nd Dw DA Tg TS α -30/70 α 100/300 HK FA S
L-37 370±5 <35 >85 0.448 0.408 2.5 1.582 2 1 440 490 94 103 460 170 3.26
L-38 380±5 <35 >85 0.449 0.408 2.5 1.555 2 1 480 535 79 86 490 130 2.96
L-39 390±5 <35 >85 0.450 0.410 2.5 1.588 2 1 440 490 90 100 460 170 3.29
L-42 420±5 <25 >85 0.452 0.412 2.5 1.528 2 1 550 600 92 105 540 130 2.59
Y-44 440±5 <25 >85 0.462 0.426 2.5 1.535 1 2 570 600 99 107 540 130 2.59
Y-48 480±5 <25 >85 0.498 0.468 2.5 1.528 3 1 560 625 94 105 540 130 2.67
Y-50 500±5 <25 >85 0.516 0.470 2.5 1.541 2 1 560 620 96 108 540 130 2.68
Y-52 520±5 <25 >85 0.538 0.458 2.5 1.541 2 1 560 620 96 108 540 130 2.68
O-54 540±5 <25 >85 0.572 0.426 2.5 1.528 1 1 560 625 99 107 520 140 2.68
O-56 560±5 <25 >85 0.612 0.387 2.5 1.528 1 1 560 625 93 104 520 140 2.68
O-58 580±5 <25 >85 0.654 0.345 2.5 1.528 1 1 560 625 93 104 520 140 2.68
R-60 600±5 <25 >85 0.690 0.309 2.5 - 1 2 560 620 93 103 520 140 2.69
R-62 620±5 <25 >85 0.714 0.286 2.5 - 1 1 560 620 95 107 520 140 2.68
R-64 640±5 <35 >85 0.726 0.274 2.5 - 1 1 555 620 94 106 520 140 2.68
R-66 660±5 <35 >85 0.732 0.268 2.5 - 1 3 530 565 98 117 470 160 2.85
print-friendly data table
λT(nm): Transition Wavelength. It is defined as the wavelength at the mid-point of the transition interval.
Δλ(nm): Transition Interval. It is defined as the mean distance between the point of 72% transmittance and the point of 5% transmittance.
TH(%): Average High Transmittance. It is expressed by the average transmittance for the high transmittance range which extends from the high transmittance limit wavelength to 800nm.
Absorption limit wavelength: Transmittance is specified to be 5%.
High transmittance limit wavelength: Transmittance is specified to be 72%.
TA(%): Absorption-Range Transmittance. It is expressed by the transmittance in the absorption range that is at least 30nm shorter in wavelength than the absorption limit wavelength, and is specified to be 1% or less.

Note: The listed data are standard value. Because of continuous product improvement, the various data listed are subject to change without notice.