Abstract: Methods and structures of photodetectors are described. The structure may include a readout integrated circuit substrate having an internally integrated capacitor. The structure may additionally include an external capacitor overlying the readout integrated circuit substrate. The external capacitor may be coupled with the internally integrated capacitor of the readout integrated circuit substrate, and configured to operate in parallel with the internally integrated capacitor of the readout integrated circuit substrate. The structure may also include a detector overlying the external capacitor.

Abstract: Systems, devices, and methods are disclosed for testing the boresight of a gimbaled camera and laser system, such as an infrared countermeasures (IRCM) system, in extreme environments. Light simulating a target is reflected through an optics system to the camera, with a portion of the light reflected back from a corner cube reflector through the optics system as a reference. A laser beam from the laser is received through the same optics system, and a position of the corner cube reflected reference and laser beam are compared in order to determine whether the camera and laser are properly aligned. A spherical shell adapted to position the camera at its geometric center keeps misaligned laser pulses from reflecting back into the camera.

Abstract: An objective lens assembly suitable for use in helmet-mounted applications. The objective lens assembly comprises two prisms that collectively are configured, oriented and bonded relative to each other to separate and allow simultaneous imaging of two separate spectral bands (such as VNIR and LWIR bands) received from the same object scene via a common window such that the object scene may be viewed from the same perspective without the effects of parallax.

Abstract: A thermal imaging system includes a mounting structure characterized by a first thermal conductivity and a focal plane array mounted to the mounting structure. The thermal imaging system also includes an optical system coupled to the mounting structure and a heating element coupled to the mounting structure. The thermal imaging system further includes a thermal isolator coupled to the mounting structure and characterized by a second thermal conductivity lower than the first thermal conductivity.

Abstract: A laser resonator and method for forming the laser resonator are provided. The method comprises placing a housing for the laser resonator in an alignment fixture, attaching a bond plate to an optical component of the laser resonator, attaching a first end of an alignment arm to the bond plate attached to the optical component, attaching a second end of the alignment arm to the alignment fixture such that the optical component is disposed over the housing, aligning, via the alignment fixture and the alignment arm, the optical component relative to the housing, and bonding the aligned optical component to the housing. The first end of the alignment arm may removed once the aligned optical component is bonded to the housing.