-
750 nm Long Pass, 25 mm Dia.
Long Pass Filter Specifications | LP-750-25
Cut-On Wavelength
750 nm
Cut-On Wavelength (Range)
701 – 900 nm
Cut-On Tolerance
±3 nm
Transmission Region
Cut-on λ to 2.2 µ minimum
Minimum Peak Transmission
75%
Slope (OD 0.3 to 4.0)
3%
Blocking
10-4 Int. Min. / 10-5 Int. Avg.
Blocking Range
200 nm-Cut On λ
Size (mm)
25 mm dia.
Size Tolerance
+0.0/-0.2 mm
Thickness
6.3 mm
Thickness Tolerance
+0.0/-0.2 mm
Scratch/Dig
80/50
Clear Aperture
21 mm
Mount
Aluminum, Black Anodized
Operating Temperature Range
-20⁰ C to 75⁰ C
-
800 nm Long Pass, 25 mm Dia.
Long Pass Filter Specifications | LP-800-25
Cut-On Wavelength
800 nm
Cut-On Wavelength (Range)
701 – 900 nm
Cut-On Tolerance
±15 nm
Transmission Region
Cut-on λ to 2.2 µ minimum
Minimum Peak Transmission
75%
Slope (OD 0.3 to 4.0)
3%
Blocking
10-4 Int. Min. / 10-5 Int. Avg.
Blocking Range
200 nm-Cut On λ
Size (mm)
25 mm dia.
Size Tolerance
+0.0/-0.2 mm
Thickness
6.3 mm
Thickness Tolerance
+0.0/-0.2 mm
Scratch/Dig
80/50
Clear Aperture
21 mm
Mount
Aluminum, Black Anodized
Operating Temperature Range
-20⁰ C to 75⁰ C
-
850 nm Long Pass, 25 mm Dia.
Long Pass Filter Specifications | LP-850-25
Cut-On Wavelength
850 nm
Cut-On Wavelength (Range)
701 – 900 nm
Cut-On Tolerance
±15 nm
Transmission Region
Cut-on λ to 2.2 µ minimum
Minimum Peak Transmission
75%
Slope (OD 0.3 to 4.0)
3%
Blocking
10-4 Int. Min. / 10-5 Int. Avg.
Blocking Range
200 nm-Cut On λ
Size (mm)
25 mm dia.
Size Tolerance
+0.0/-0.2 mm
Thickness
6.3 mm
Thickness Tolerance
+0.0/-0.2 mm
Scratch/Dig
80/50
Clear Aperture
21 mm
Mount
Aluminum, Black Anodized
Operating Temperature Range
-20⁰ C to 75⁰ C
-
900 nm Long Pass, 25 mm Dia.
Long Pass Filter Specifications | LP-900-25
Cut-On Wavelength
900 nm
Cut-On Wavelength (Range)
701 – 900 nm
Cut-On Tolerance
±15 nm
Transmission Region
Cut-on λ to 2.2 µ minimum
Minimum Peak Transmission
75%
Slope (OD 0.3 to 4.0)
3%
Blocking
10-4 Int. Min. / 10-5 Int. Avg.
Blocking Range
200 nm-Cut On λ
Size (mm)
25 mm dia.
Size Tolerance
+0.0/-0.2 mm
Thickness
6.3 mm
Thickness Tolerance
+0.0/-0.2 mm
Scratch/Dig
80/50
Clear Aperture
21 mm
Mount
Aluminum, Black Anodized
Operating Temperature Range
-20⁰ C to 75⁰ C
Optometrics
Longpass Filters with Cut-On Wavelength (Range) 701 - 900 nm and Mount Aluminum, Black Anodized
Long Wavepass Filters
A longpass filter or long wavepass filter (LP filter) is one that transmits at longer wavelengths and rejects shorter wavelengths. By design, the transition in a longpass filter between the 50% cut-on to rejection is quite sharp. This makes it much easier to separate excitation from emitted wavelengths without interfering with wavelengths of interest. Long wavepass filters are useful in applications where spectral noise reduction is important or for isolating a particular region of the spectrum.
↓ Scroll down to view product inventory ↓
- Available every 50nm from 500nm to 1500nm
- Mounted in a black anodized aluminium ring
- Can be used in combination with shortpass filters for custom bandpass filtering
- Fine tune cut-on wavelengths by changing angle of incidence
- Emission filters in fluorescence applications
- Eliminate unwanted radiation over ultraviolet, visible, or infrared
- Ideal for Raman spectroscopy
- Order sorting filters
- Astronomy applications to study IR radiation without visible light
- Laser-induced fluorescence to isolate source radiation
