Abstract:
This invention provides an image formation device at low cost, which can be miniaturized, of which the quality of an image is uniform, which can form a high resolution of color image at high speed wherein even if the relative mounting position of a light source and an optical element is dislocated, the deterioration of color registration can be reduced. Laser beams for each color sequentially emitted from each laser element of a laser array pass an imaging optical system and are split into the side of photoconductor drums and into the side of a deflecting optical system by a splitting optical system. Laser beams incident on the deflecting optical system are reflected by optical mirrors so that principal rays of the laser beams respectively converge on photodetectors and are incident on approximately the same position of each photodetector. The photodetectors individually detect the luminous energy of laser beams from each laser element.
Abstract:
An adapter for an optical eyepiece for propagating a non-collimated light beam from an object along an optical axis of the eyepiece so as to present an image to an observer, the adapter comprising a beam splitter for inserting into the eyepiece so as to intercept the light beam and direct a portion thereof outside the eyepiece through an exit aperture of the beam splitter without substantially changing the image to the observer. The adapter is particularly useful for extracting a portion of an image from an eyepiece having restricted access in a night vision goggles thus permitting an external scene to be recorded simultaneous with its being viewed by the observer.
Abstract:
An optical system of reflected light path of a magneto-optical head, comprising very few parts that can be easily manufactured and assembled at a low cost. The present invention makes use of a beam splitter and a plane convex lens to simplify the optical system of a magneto-optical head such that the reflected beam coming from the plane convex lens is split into three light beams by the beam splitter. Among the three split light beams, two are reflected beams used for focus and track photodetection, and the other is a transmitted beam used for RF signal photodetection. A magneto-optical head with an optimized design as such can reduce the cost of manufacture and assembly. Due to the simplicity in structure, the optical parts according to the present invention can be assembled easily.
Abstract:
A gimballed optical system within a seeker head includes a relatively low power laser coupled to a relatively higher power laser by way of a flexible fiber optic cable to reduce the mass that must be oscillated in a scan.
Abstract:
A welding apparatus operable with a high power CO.sub.2 laser beam having a laser beam wavelength-corresponding coating on an optical window mounted in the beam path deflecting the reflected workpiece image into a viewing channel allowing a real-time observation of the welding.
Abstract:
A gimballed optical system within a seeker head includes a relatively low power laser coupled to a relatively higher power laser by way of a flexible fiber optic cable to reduce the mass that must be oscillated in a scan.
Abstract:
An optical transmission spectrometer for transmission measurements of absorbing and scattering samples includes light sources mounted parallel to each other in a holder. The beams of light emanating from the light sources are directed through a beam-combiner. The beam-combiner includes a first refractive surface at an angle of incidence of 45.degree.. The first refractive surface refracts light toward a common axis. The beam-combiner includes a second refractive surface parallel to the first refractive surface for refracting the beam of light along a common axis parallel to the original direction of the beam of light. The beam-combiner can include additional refractive surfaces for other beams of light to combine the beams of light into a primary beam. The spectrometer includes a collimating tube extending along the common axis for baffling stray light and directing the primary beam through a sample. A second collimating tube is provided on the side of the sample opposite the first collimating tube for baffling stray light passing through the sample. The second collimating tube directs the primary beam to a detector package mounted in a holder, where the detector viewing area of the sample is limited to that of the primary beam. As an alternative, an optic which is capable of directing multiple light beams onto a common intersection point may be used in place of the previously mentioned beam-combiner. Unlike the beam-combiner which closely aligns multiple parallel light beams and transmits them as substantially a single beam along the common axis, the alternate optical directs multiple light beams at an angle onto a common intersection point. The optic is fabricated from translucent material with first and second refractive surfaces for receiving light beams from a source and refracting the light beams toward the common intersection point.
Abstract:
In an interferometric apparatus the path of the output beam of a rotary Optical Path Difference scanning assembly leading to an electrically responsive detector is maintained substantially fixed in space for any scan angle within predetermined limits, thus obviating a serious drawback of a prior art proposal wherein the output beam translates significantly over the detector face with changes in scan angle, with the result that the detector output is vitiated by totally spurious variations of the energy reaching it.In one embodiment, the scanning assembly comprises a beam splitter having a semi-reflective layer the output face of which cooperates with the face of an output mirror normal thereto, the axis of rotation being substantially coincident with the line of intersection between the prolongation planes of the two faces. A Fourier Transform spectrophotometer embodying the assembly is also described.
Abstract:
The present invention provides a radiometer for simultaneously detecting luminescence and reflectance about a particular Fraunhofer line from a material (i.e. target) which includes an interchangeable optical filter assembly of lightweight construction for each Fraunhofer line of interest which substantially alleviates the adverse polarization effects normally experienced in radiometers of this type and which further provides an improved balance between the two light beams being sensed by the radiometer. The optical filter assembly includes a single beamsplitter which reflects the majority of the light from the target with little adverse polarization effects to a narrow band filter which passes only the light existing at the particular Fraunhofer line (i.e. "c" component of luminescence). The remaining smaller fraction of the light passes through the beamsplitter with only slightly greater polarization to a broad band filter which, in turn, passes only the light in the continuums adjacent the Fraunhofer line (i.e. "d" component of luminescence). The intensity of the light from the narrow and broad band filters are measured for use in calculating the luminescence and reflectance emanating from the target.
Abstract:
Disclosed is a light splitter in which a number of minute inclined surfaces inclined with respect to the surface of a parallel planar glass is formed. At least part of a light beam having entered the light splitter travels while being totally reflected by said surface and said inclined surfaces and the remainder of the light beam travels without being totally reflected by said inclined surfaces.