Multispectral filter

An optical filter, comprising:

• a first mirror and a second mirror,
• the first mirror including a plurality of quarterwave stacks,
• the plurality of quarterwave stacks including a plurality of layers;
• and
• a spacer disposed between the first mirror and the second mirror,
• the optical filter being associated with one or more of a 50% relative bandwidth of between approximately 0.9 nm and approximately 5.3 nm, a 50% relative bandwidth of between approximately 3.75 nm and approximately 5.75 nm, or a 50% relative bandwidth of between approximately 4 nm and approximately 8 nm.

A multispectral filter, comprising:

• a first set of dielectric layers to reflect a portion of light directed toward the first set of dielectric layers,
• the first set of dielectric layers including a first one or more quarterwave stacks;
• a second set of dielectric layers to reflect a portion of light directed toward the second set of dielectric layers,
• the second set of dielectric layers including a second one or more quarterwave stacks, and
• a thickness of at least one layer of the first set of dielectric layers or the second set of dielectric layers being detuned from a quarterwave thickness.

A filter comprising:

• a first quarterwave stack including one or more alternating layers of a first material and a second material;
• and
• a second quarterwave stack including one or more alternating layers of a third material and a fourth material,
• the first material, the second material, the third material, and the fourth material comprising three or more different materials, and
• the filter being associated with one or more of a 50% relative bandwidth of between approximately 0.9 nm and approximately 5.3 nm, a 50% relative bandwidth of between approximately 3.75 nm and approximately 5.75 nm, or a 50% relative bandwidth of between approximately 4 nm and approximately 8 nm.