Why is Custom 420nm Longpass Filter Better?

The cut-on wavelength of Newport Stabilife' Colored-Glass Alternative filters changes slightly with varying angles of incoming collimated light. The degree of this wavelength shift is contingent on both the incident angle and the effective index (ne) of the filter. This adjustment feature proves invaluable in research settings, allowing for precise tuning of a CGA filter to a desired wavelength. The formula to compute the wavelength shift under random polarized collimated light is as follows:
λθ = λo [1-(no/ne)² sin²θ]¹/²
where
λθ = Cut-on wavelength at θ° angle of incidence
λo = Cut-on wavelength at 0° angle of incidence
θ = Angle of incident light off normal incidence
no = Effective index of refraction of the environment (no = 1 in air)
ne = Effective index of refraction of the optic as specified by its thin film layers

If you want to learn more, please visit our website yanggu.

In several cases, the light hitting the filter comes in through a convergent or divergent cone. This cone consists of multiple light rays at various angles, from normal incidence to the extreme angle that defines the entire cone. The resulting effect from these rays is a weighted average of the incident light, causing a shift toward shorter wavelengths, which is less than what would occur if only collimated light were presented at the extreme angle.

Originally, Newport's Colored-Glass Alternative filters were designed for bespoke and OEM uses. They serve as alternatives to Colored-Glass filters made from non-RoHS compliant materials, replacements for discontinued Colored-Glass filters from major manufacturers, or new products that fill wavelength gaps in the offerings of these manufacturers. Our versatile coating processes and equipment allow us to provide a nearly infinite range of combinations including wavelength, size, shape, thickness, optical figure, surface quality, and more. We encourage you to share your detailed needs with our technical sales team so we can create a tailored solution to fit your specific application.

If you are looking for more details, kindly visit Custom 420nm Longpass Filter.

Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify their trustworthiness.

If you want to learn more, please visit our website Sapphire Optical Window.