Short Wave Pass Filters what are they?

Short Wave Pass Filters what are they?

Short Wave Pass Filters or SWP filters are a commonly used building block in optical instrument design. As the name suggests, they allow light of shorter wavebands to pass through whilst rejecting shorter bands. They are used in all parts of the spectrum. Fig 1 below...
Dichroic filters; What are they ?

Dichroic filters; What are they ?

In many optical systems splitting of certain parts of the spectrum may be required to guide radiation into certain paths . This is often done by a filter working at a 45 degree angle, 1 part of the spectrum being reflection off the front face the other face being...
Long Wave Pass Filters; What are they?

Long Wave Pass Filters; What are they?

Long Wave Pass Filters or LWP filters are a commonly used building block in optical  instrument design. Long Wave pass filters, as the name suggests, allows light of longer wavebands to pass through whilst rejecting shorter bands. In the example below, radiation from...