400FG03-25 25mm Dia. GG-400 Colored Glass Long Pass Filter
- Type
- Filter
- Subtype
- Color Glass
- Brand
- Andover Corporation
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- Cut On Frequency
- 400 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4701161180769884
- λ
- 400 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
400FG03-25 25mm Dia. GG-400 Colored Glass Long Pass Filter by Andover Corporation
The 400FG03-25 is a 25mm diameter, 3mm thick Long Pass Filter, designed for use in optical systems requiring a specific wavelength cut-on. This filter, manufactured by Andover Corporation, is made from UVFS Mal-1965 material, a type of colored glass.
The filter's primary function is to allow light of longer wavelengths to pass through while blocking or attenuating shorter wavelengths. In this case, the cut-on wavelength is 400 nanometers, meaning it begins to transmit light at this wavelength and beyond. The cut-off wavelength is 0 nanometers, indicating that it blocks all wavelengths shorter than the cut-on.
The 400FG03-25 filter features the same coating on both the front and back surfaces, denoted as 'and 400fg03'. This coating is likely designed to enhance the filter's performance, such as by reducing surface reflections or increasing transmission.
The filter's geometry is that of a thin lens, which can be beneficial in certain optical system designs. The filter is available from Andover Corporation, and the provided weblink indicates that it is currently in stock.
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