1. Brief Introduction
The crystal optical filter consists of a set of low-pass filer and infrared filter. 
2. Material Nature
1) The low-pass filter is made from synthetic quartz crystal of excellent quality.
2) The infrared filter is made from synthetic quartz crystal of excellent quality via specialized coating process. 3. Optical Properties
1) Flatness
2) The flatness of the single side of the infrared filter shall be less than 5 Newton¡¯s Rings.
3) Parallelism: the error of the parallelism between the side of the low-pass filter and the side of the infrared filter shall be less than 0.02 mm.
4) The cutting precision of the crystal axis: the error between the walk-off angle and the base angle is 0.1.
5) Light Transmission Index:
|
400nm |
:T>75% |
700nm |
:T<5% |
|
450nm~600nm |
:T>85% Ave |
750~1000nm |
:T<3% |
|
645 ¡À10nm |
:T=50% |
1100nm |
:T<10% |
4. Duration
1) No defect shall occur within 500 hours below 45 oC and in 90% relative humility.
2) No defect shall occur in the temperature between 20 oC to 85 oC. |
| For Examples:> |
1)Transmission>95% over 400-440nm at 45deg.AOI regardless of the polarization states of input light;
2)Reflection>98% over 480-680nm at 45deg; AOI regardless of the polarization states of input light;
3)Backside AR coating is<0.15% over 400-440 nm;
4)7.0x10.0¡À0.1mm square and 1.0-2.0¡À0.1mm thick. |
1).Transmission>85% over 440nm@45deg AOI regardless of polarization states of input light;
2).Reflect >95% over 520-670nm@45deg AOI regardless of polarization states of input light;
3).Backside AR Coating<0.3% over 440nm;
4).7.0x10.0x1.0mm ¡À0.1mm; |
1)Transmission>85% over 560-670nm@ 45deg AOI regardless of polarization states of input light;
2)Reflect>95% over 532nm @45deg AOI regardless of polarization states of input light;
3)Backside AR Coating<0.3% over 560-670nm;
4)7x10x1.0 mm in sizes,¡À0.1mm; |
| Other specification is on your requirements. |
