The MAN-25-1 is a Neutral Density Filter, specifically an Absorptive Neutral Density Filter, mounted on optical glass. This filter is designed for use in the visible light spectrum, specifically between 400-700nm. The filter is manufactured by OptoSigma, a leading vendor in the optical industry, and is available for purchase through their website.
The filter has a catalog number of MAN-25-1 and is circular in shape with a diameter of 25mm. It has a thickness of 2mm, making it a thin lens. The front and back of the filter are coated with 'opt and-01', a coating type that is not specified in the data provided. However, it is known that the material ID of the filter is 'uvfs mal- 1965'.
The wavelength of the filter is 550nm, which is in the green light spectrum of the visible light range. This filter is ideal for applications that require a reduction in light intensity without altering the color composition of the light.
The filter is currently in stock and can be purchased directly from the OptoSigma website. Detailed specifications, including pricing and availability, can be found on the product page linked below.