Abstract: A night vision system includes an eyepiece and a video camera to capture a video image that can be remote to the eyepiece. The eyepiece includes an optical device with a front side and a back side. A splitting surface within the optical device reflects some of a video image toward an eye of a user of the eyepiece, and the splitting surface further allows some light of an optical image received from in front of the eyepiece to past through the eyepiece to the eye of the user. The layer of switchable coating on the eyepiece can be switched between a transparent mode and an opaque mode by the user. When in an opaque mode no light can leave the front side of the optical device and only the video image can be seen through the eyepiece.

Abstract: A night vision system includes an eyepiece and a video camera to capture a video image that can be remote to the eyepiece. The eyepiece includes an optical device with a front side and a back side. A splitting surface within the optical device reflects some of a video image toward an eye of a user of the eyepiece, and the splitting surface further allows some light of an optical image received from in front of the eyepiece to past through the eyepiece to the eye of the user. The layer of switchable coating on the eyepiece can be switched between a transparent mode and an opaque mode by the user. When in an opaque mode no light can leave the front side of the optical device and only the video image can be seen through the eyepiece.

Abstract: A system and method for focusing electromagnetic radiation is presented. A lens has an outside perimeter. A curved lens surface is located inside the outside perimeter. The curved lens surface is to bend at least one wavelength of electromagnetic energy passing through the curved surface. One (or more) mounting surface(s) are located between the outer perimeter and the curved lens surface. The mounting surface has at least one flat surface.

Abstract: An multispectral optical device, comprising a common aperture objective assembly for image acquisition in the short wave infrared (SWIR) waveband and at least one additional waveband; a SWIR detector for detecting an image in the SWIR waveband; and a beam mixer for fusing an image detected by the SWIR detector and an image acquired in the at least one additional waveband.

Abstract: An optical device comprises a dichroic beamsplitter for splitting an object beam into a reflected beam having a first waveband and a transmitted beam having a second waveband; an astigmatism-correcting lens element, disposed in the optical path of the transmitted beam; and a coma-correcting lens element, disposed in the optical path of the transmitted beam.