IR cut-off LongPass Filter
Band pass filter can separate a band of monochromatic light, the ideal transmittance of band-pass filter through the bandwidth is 100%, while the actual band-pass filter pass band is not the ideal square. The actual band-pass filter generally has a center wavelength λ0, a transmittance T0, a half width of the pass band (FWHM, a distance between two positions where the transmittance in the pass band is half the peak transmittance), the cutoff range and other key parameters to describe.
Band-pass filter is divided into narrow-band filter and broadband filter.
In general, a very narrow bandwidth or high cut-off steepness will make the product more difficult to process; meanwhile the pass band transmittance and cut-off depth is also a contradictory indicator
Wuhan Especial Optics' band-pass filters are composed of a stack of equally spaced dielectric layers. The number of layers and thicknesses are calculated with excellent cut-off depth (typically up to OD5 or higher), better steepness and a high transmittance (70% narrowband, 90% broadband).
Applications:
1. Fluorescence microscopy
2. Raman fluorescence detection
3. Blood component testing
4. Food or fruit sugar detection
5. Water quality analysis
6. Laser interferometer
7. Robot welding
8. Astronomical telescope observation celestial nebula
9. Laser ranging and so on
Material | Optical glass |
CWL | IR spectrum |
FWHM | 5-50nm |
Transmission | >90% @850nm |
Blocking range | 400-1100nm or as required |
OD | 1-6 |
Surface Quality | 60-40, 40-20 Scratch-Dig |
Clear Aperture | 90% of Diameter |
Bevel | Protective bevel as needed |
Frame | Aluminum ring or without ring |
Factory
Reception
WHEO is very good at developing and processing kinds of infrared optical components at ultra high precision, ultra thin, very large, ultra small and customization. Like 0.5mm thickness CaF2 window, 300mm diameter Germanium and ZnSe window. Our featured products include: Optical Protective Window (AR BBAR coating), High Reflection Mirrors (Metalic and Dielectric coating), Optical Lens (Aspheric Lens, Achromatic Lens, Cylindrical lens, Ball Lens, Powell Lens, Collimator Lens), Optical Filters (UV pass, IR pass, narrow bandpass, notch filter), Optical Prism, Galvo Mirror, Polarization rotators.
a: Dimesion size : 5-300mm , thickness up to customer requirements
b: Many material could be choosed, like BK7, Fused Silica, Sapphire, MgF2, CaF2, Ge, Si, Znse, ZnS and so on.
c: AR HR DLC coating or as your request
For more please visit our website: www.wheo.cn
Packing Details: Protective film or Capacitor paper,Pearl cotton,Cardboard box.
Delivery Details: 7 days for stock.
3-4 weeks for custom-made products for sample.
in common, 4 weeks for mass production
What's the way of shipping?
We commonly use UPS, FedEx, DHL, TNT, SF, EMS etc. If you have your own express account, it's great.
How to pay?
We usually draft Trade Assurance Order on Alibaba, you can pay by the most convenient way which also protect most of your rights.
What's the deliver time?
For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.
How to ensure the safety of payment?
Wuhan Especial Optic.,INC is the gold supplier and supports Alibaba Trade Assurance. Payment<=5000USD, 100% in advance. Payment>5000USD, 50% T/T in advance, balance before shippment.
Can I customize the products based on my need?
Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.
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