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490FDS50 50 x 50 mm Shortpass Dichroic Filter 490nm

490FDS50 50 x 50 mm Shortpass Dichroic Filter 490nm

Type
Filter
Subtype
Dichroic Filter
Brand
Knight Optical
Product webpage
Knight Optical products in the 3DOptix catalog

Properties

Shape
Rectangular
Cut Off Frequency
490 nm
Cut On Frequency
932 nm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5167817367777034
λ
588 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

490FDS50 50 x 50 mm Shortpass Dichroic Filter 490nm

The 490FDS50 is a high-quality dichroic filter, measuring 50 x 50 mm, designed for shortpass applications with a cutoff wavelength of 490nm. This filter is sourced from Knight Optical, a renowned vendor known for their extensive catalog of optical elements.

The filter is made from N-BK7 Schott, a popular optical glass due to its excellent homogeneity, low auto-fluorescence, and high damage threshold. The filter's geometry includes a thickness of 1.1mm, making it suitable for a wide range of optical applications.

The 490FDS50 features a dichroic coating on both the front and back surfaces, specifically the KNI 490FDS-0 coating. This coating is designed to reflect wavelengths shorter than 490nm and transmit wavelengths longer than 490nm. The cut-on wavelength is 932nm, indicating that wavelengths shorter than this will be reflected.

This filter is rectangular in shape and has a thin lens design. It is currently in stock and available for purchase on Knight Optical's website. For more information, users can visit the provided weblink.

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