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 table | definition 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.
Color Filter Glass
