It is a dark black filter glass that transmits the ultraviolet region, absorbs the visible region, and slightly transmits the near infrared region. The numbers represent the wavelengths with the highest transmittance. It is mainly used to extract only ultraviolet rays, and is used to selectively transmit wavelengths of 253.7 nm and 365 nm, which are typical spectral lines of mercury lamps.
For UV equipment
The actual product will be square.
Thickness (mm): 2.5
Dimension (mm): 50×50
Caution
This product is manufactured in Japanese standards.
Some products may not meet the standards of your item.
Please check the specification carefully before you order.
Wavelength (nm)360 (becomes the highest transmittance)
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Ultraviolet photography (shooting of flowers, etc.)
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80%
The photo used in the product description was a photo of a round filter, but the product that actually arrived was a square product. Please change the product photo. We recommend using the kenkou 50 square holder for square filters. (Translated by machine.)