Patent ID: 7995279

Claim:
An optical device, comprising: a first prism having a first, second, and third face; a second prism having a first, second, and third face; a first dichroic filter disposed on a first face of the first prism, the first dichroic filter configured to reflect light of a first color and to pass light of a second color; a second dichroic filter disposed on a first face of the second prism, the second dichroic filter configured to reflect light of the first and second colors and to pass light of a third color; the second face of the first prism bonded to the second face of the second prism; the first prism and the second prism arranged such that light of a first color entering first prism through the third face of the first prism is reflected by the first dichroic filter to the second dichroic filter and light of a second color entering the first face of the first prism through the first dichroic filter passes through the first filter to the second dichroic filter.