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All Products / Optics / Optical Filters / Longpass Filters / Hoya Colored Glass Longpass Filters
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Hoya R72 (720nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

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Stock #66-068 3-4 days
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£74.80
Qty 1-10
£74.80
Qty 11+
£66.30
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Dimensions (mm):
50.8 x 50.8
Cut-Off Position λc (nm):
720±9
Cut-On Wavelength (nm):
720.00 ±9
Density (g/cm3):
2.86
Glass/Filter Number:
Hoya R72
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Colored Glass
Length (mm):
50.80
Coating:
Uncoated
Color:
Black
Surface Quality:
80-50
Transformation Temperature (°C):
525
Thickness (mm):
2.50
Thickness Tolerance (mm):
±0.2
Type:
Longpass Filter
Wavelength:
IR
Width (mm):
50.80
Dimensional Tolerance (mm):
±0.38
Reflection Factor Pd:
0.92
Bevel:
Protective as needed
Δλ (nm):
<45
TH (%):
>85

Regulatory Compliance

RoHS 2015:
Exempt
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Reach 224:
Compliant
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Certificate of Conformance:
View
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Product Family Description

  • UV, VIS and IR Pass Ranges
  • VIS Can Be Used for Color Bandpass
  • Also Available Mounted

Hoya Colored Glass Longpass Filters feature a colored glass substrate. These filters are manufactured from substrates with inherently different absorption and transmission properties across a specific spectral region. Hoya Colored Glass Longpass Filters have UV, VIS, and IR pass ranges. A longpass filter has low transmission in the shortwave region (stopband) and high transmission in the longwave region (passband). These filters are also available in a mounted version. 

Longpass Filter Kits
Longpass filter kits are available in three different options: UV-VIS, VIS, or VIS-NIR. Each kit contains 8 filters in either 12.5mm diameter, 1" diameter, or 2" square. 

UV-VIS Kit Contains: WG 295, WG 305, WG 320, L 37, GG 400, GG 420, GG 435, GG 455
VIS Kit Contains: GG 475, GG 495, OG 515, OG 530, OG 550, OG 570, OG 590, RG 610
VIS-NIR Kit Contains: RG 630, RG 665, RG 695, RG 715, RG 780, RG 830, RG 850, RG 1000
Complete Filter Kits
Complete filter kits are available with 12.5mm diameter, 50.0mm diameter, 1" diameter, or 2" square filters. Each kit contains all 37 Longpass Glass Color Filter types.

Note: Due to supply chain issues, our kits may be delivered with an alternative packaging solution in place of a wooden box. For any questions, please contact [email protected].

Filter Simulation Software

Click here to download HOYA’s colored glass filter simulation software which can be used to calculate the internal transmittance and external transmission of each HOYA glass type. The software can simulate the performance of individual filters with user specified thickness.

Technical Information

 
λs limit of stopband: specified at 0.001% internal transmittance
λc cut-off position: specified at 50% internal transmittance
λp limit of the passband
tip internal spectral transmittance at λp
ρ density
Tg transformation temperature