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68-661 50 mm Dia. Traditional Coated Infrared (IR) Longpass Filter; t=1mm 4500nm

68-661 50 mm Dia. Traditional Coated Infrared (IR) Longpass Filter; t=1mm 4500nm

Type
Filter
Subtype
Longpass Filter
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
50 mm
Cut Off Frequency
Cut On Frequency
4500 nm

Material

Name
Germanium
Dispersion Equation
Sellmeier
n (λ)
5.3146589099372665
λ
588 nm
B1
0.4886331
C1
1.393959 μm2
B2
14.5142535
C2
0.1626427 μm2
B3
0.0091224
C3
752.19 μm2

68-661 50 mm Dia. Traditional Coated Infrared (IR) Longpass Filter; t=1mm 4500nm

The 68-661 is a 50 mm diameter Infrared (IR) Longpass Filter, manufactured by Edmund Optics. This filter is designed with a traditional coating, featuring a catalog number of 68-661. The filter is currently in stock and available for purchase through the official Edmund Optics website, linked below.

https://www.edmundoptics.com/p/450mum-50mm-diameter-infrared-longpass-filter/23279/

The 68-661 filter is a Longpass Filter, a type of optical filter that passes longer wavelengths of light and blocks shorter wavelengths. This particular filter has a cut-on wavelength of 4500nm, meaning it begins to transmit light at this wavelength and beyond. The cut-off wavelength is 0nm, indicating that it blocks all wavelengths of light below 4500nm.

The filter is made from Germanium Burnett, a material known for its excellent optical properties, particularly in the infrared region of the spectrum. The filter has a diameter of 50mm and a thickness of 1mm, making it suitable for a wide range of optical applications.

The 68-661 filter is coated on both the front and back surfaces with EDm 33-971, a proprietary coating developed by Edmund Optics. This coating enhances the filter's performance and durability, ensuring reliable operation in demanding environments.

The filter's shape is described as a Thin Lens, indicating that it has been designed to minimize optical aberrations and distortions. This makes it an ideal choice for applications that require high-precision optical performance.

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