Abstract:
A putting aid includes a clamp for mounting the putting aid on the shaft of a putter and a dotted line projector mounted on the clamp for adjustment relative to the contact surface of the putter so that the dotted line is projected perpendicular to the contact surface. The dotted line projector includes a bright light source, such as a laser diode, a power source and the necessary optical elements to generate and project a line of dots on the putting surface extending generally perpendicular to the putter clubface. In one embodiment, the dots are equally spaced apart so that the distance of the backswing can be gauged by observing the number of dots that pass over the surface of the ball during the backswing. In one embodiment the putting aid includes a mounting ball secured to the clamp, and the housing further includes a housing clamp adapted to be releasably secured on the mounting ball to allow simultaneous positioning of the projector about two or more axes.
Abstract:
A night vision apparatus 10 includes a first focusing refracting lens 28 which focuses light rays 29 from distant scene 14 onto a light intensifier 30. The kinoform 40 or bifringent lens 78 are disposed in the light path to allow light rays 35 from near scene 18, 20, 22 and 24 to be focused onto light intensifier 30 to form a multi-focus night vision apparatus with increased depth of focus.
Abstract:
A multipurpose sighting device includes a viewing window, an illuminated display, a beam combiner positioned to transmit light from a target scene and reflect light from the illuminated display through the viewing window, and projection optics having a plurality of optical elements to direct light from the display toward the beam combiner, the projection optics projecting an image of the display through the viewing window at a distance to be in focus with the target scene.
Abstract:
An aiming sight includes a controller, a power supply, an LED array, and a collimator. The power supply powers the LEDs to turn-on and turn-off, and powers the collimator to rotate. The collimator rotates to different rotational positions while the controller, the power supply, and the LED array remain fixed in place. The LEDs are positioned such that one LED and the collimator are at a constant angle and separated by a constant focal distance for each collimator position. The controller controls the collimator to rotate to a collimator position to generate an aiming dot at an angular position corresponding to the collimator position. The controller turns-on the LED which is at the constant angle and separated from the collimator by the constant focal distance and turns-off the remaining LEDs such that the collimator collimates light from the turned-on LED into the aiming dot at the angular position corresponding to the collimator position.
Abstract:
A low profile holographic sight includes a base having a mounting mechanism and a body mounted on the base for housing a laser diode, an associated electronic control and power source, and optical elements including a collimator, a transmission image hologram of the reticle pattern, and a reflective diffraction grating, wherein the optical elements are arranged within the body to direct and fold the laser beam in a substantially generally horizontal path, and is insensitive to drift in laser wavelength. The optical elements superimpose an image of the reticle pattern over the direct view of the target scene in a generally parallel and close relationship with the barrel of a firearm, such as a shotgun or a rifle, upon which the sight is mounted.
Abstract:
In a speckle imaging process, the contribution of non-uniform, incoherent background illumination is removed via an aperture sampling technique. A pair of uncorrelated speckle images are produced and subtracted from one another to eliminate the non-coherent background contribution. The result of this subtraction is rectified so as to provide a signal which may be displayed on a video display. Disclosed are techniques for real time video display of enhanced speckle images as well as techniques for visualizing vibrational modes and surface roughness mapping.
Abstract:
A lightweight contact holographic sight includes a housing and a base which form a compartment containing a laser diode, an associated power source, and optical elements including a mirror, an off axis collimator, a reflection grating, and an image hologram of a reticle pattern, wherein the optical elements are arranged within the compartment to direct and fold the laser beam in a substantially generally vertical path. In one aspect of the invention, an elevation and windage adjustment mechanism is provided to rotate the reflection grating about two orthogonal axes to thereby adjust the projected reticle pattern for windage and elevation. In another aspect of the invention a removable battery compartment including a cam surface which is releasably contacted by a cam lever arm pivotally mounted on the sight housing or the base to allow for quick tool-less removal of the compartment for battery replacement.
Abstract:
The present invention is an apparatus for forming a spectrally weighted value from received multispectral radiation. The spectral weighting is done optically prior to detection of the received radiation by dispersing the received multispectral radiation into a plurality of wavelength bin areas. This dispersed radiation is then passed through a weighting filter which includes first and second filter elements for each of the wavelength bin areas. The filtered radiation is then converged to corresponding detectors with the spectrally weighted value formed by the difference between the signals of the first and second detectors. A pair of filters, two detectors and a subtracter are employed to produce a generalized weight factor having positive or negative weights. This system can form one or more spectrally weighted values from the radiation from a single pixel, or one spectrally weighted value form the radiation from a plurality of pixels. The addition of a polarization filter permits the formation of spectrally weighted values for various polarizations of a single pixel.
Abstract:
A passive detection and imaging system employs interferometric and synthetic aperture techniques. A moving platform employs a pair of sensors which receive thermal electromagnetic radiations from an area of interest. The received signals are narrow band filtered by a bank of filters covering an extended bandwidth. Signals from similar narrow bands from different sensors are correlated. The plurality of frequencies and plurality of positions relative to the area of interest due to the platform motion enable generation of an inverse Fourier transform image which is resolvable in both azimuth and range. Separate preferred embodiments operating at microwave frequencies and optical frequencies are disclosed. An achromatic optical interferometric correlation technique is also disclosed.
Abstract:
An optical signal processor operating on interferometric principles serves to perform real time Fourier transformations on the intensity distribution of one-dimensional incoherent input light sources.