Abstract: In accordance with this invention, there is provided a first portable communication device for communicating with a second portable communication device, the first portable communication device including a communication module for transmitting and receiving video and audio information; an electronic display; a first image capture device for capturing an image of a first scene; a second image capture device for capturing an image of a second scene different from the first scene and way that is responsive to a user command for transmitting images of either the first or second scene or a combination thereof to the second portable communication device.

Abstract: A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.

Abstract: A method for operating an autofocus system for focusing an image on an electronic imager includes providing an adjustable lens system defining an optical path for scene light and having at least one movable lens to focus an image of the scene onto the electronic imager; and causing a first portion of the scene light to be obscured so that the electronic imager captures a first autofocus image and causing a second different portion of the scene light to be obscured so that the electronic imager captures a second autofocus image wherein portions of the first and second autofocus images are offset. The method further includes moving the movable lens to a position so that an image to be captured will be in focus.

Abstract: A method for thermally stabilizing an optical parametric oscillator (OPO) 10 to maintain constant optical path length for stable high power output places a beam dump 32 outside an OPO cavity 18. The OPO 10 has a nonlinear crystal 22 within cavity 18 for splitting a single input pump beam 14 into lower energy signal and idler beams 16, 18. The method includes providing a cavity exit port for unconverted pump and generated idler beams, and absorbing unconverted beams in beam dump 32. The method includes athermalization by actively cooling surfaces used as an optics mounting base, and athermalization by constraining the size of cavity 18 by using thermally stiff members, guiding pins or rails, or by using bimetallic materials with different expansion.

Abstract: A method for thermally stabilizing an optical parametric oscillator (OPO) 10 to maintain constant optical path length for stable high power output places a beam dump 32 outside an OPO cavity 18. The OPO 10 has a nonlinear crystal 22 within cavity 18 for splitting a single input pump beam 14 into lower energy signal and idler beams 16, 18. The method includes providing a cavity exit port for unconverted pump and generated idler beams, and absorbing unconverted beams in beam dump 32. The method includes athermalization by actively cooling surfaces used as an optics mounting base, and athermalization by constraining the size of cavity 18 by using thermally stiff members, guiding pins or rails, or by using bimetallic materials with different expansion.