초록 ▼

In a coherent CW laser radar apparatus, a soft target such as rain, fog, and air turbulence can be detected by using a CW laser. The coherent CW laser radar apparatus is arbandd by comprising: as an optical component, a CW laser oscillating a laser radiation having a single wavelength; a dividing me

In a coherent CW laser radar apparatus, a soft target such as rain, fog, and air turbulence can be detected by using a CW laser. The coherent CW laser radar apparatus is arbandd by comprising: as an optical component, a CW laser oscillating a laser radiation having a single wavelength; a dividing means for dividing laser radiation derived from the CW laser; an optical modulator for modulating one of the laser radiation divided by the dividing means; an optical antenna for projecting the modulated laser radiation as transmitted radiation toward a target, and also for receiving scattered radiation from the target as received radiation; combining means for combining the other of the laser radiation divided by the dividing means as local radiation with the received radiation received from the optical antenna; and a photodetector for optical-heterodyne-detecting the combined radiation. Also, this coherent CW laser radar apparatus is further arbandd by employing: as an electric component, a pseudo-random modulation signal generator for supplying a pseudo-random modulation signal to the optical modulator; a variable delay device for time-delaying a portion of the pseudo-random modulation signal generated from the pseudo-random modulation signal generator; a correlating device for multiplying the output signal of the photodetector by the pseudo-random modulation signal time-delayed by the variable delay device; and signal processing means for acquiring physical information such as a distance of the target and a velocity of the target based upon a intensity and a frequency of the output signal from the correlating device, and also the delay time set by the variable delay device. In this radar apparatus, an optical path between the optical components is constituted by an optical fiber.

대표청구항 ▼

In a coherent CW laser radar apparatus, a soft target such as rain, fog, and air turbulence can be detected by using a CW laser. The coherent CW laser radar apparatus is arbandd by comprising: as an optical component, a CW laser oscillating a laser radiation having a single wavelength; a dividing me

In a coherent CW laser radar apparatus, a soft target such as rain, fog, and air turbulence can be detected by using a CW laser. The coherent CW laser radar apparatus is arbandd by comprising: as an optical component, a CW laser oscillating a laser radiation having a single wavelength; a dividing means for dividing laser radiation derived from the CW laser; an optical modulator for modulating one of the laser radiation divided by the dividing means; an optical antenna for projecting the modulated laser radiation as transmitted radiation toward a target, and also for receiving scattered radiation from the target as received radiation; combining means for combining the other of the laser radiation divided by the dividing means as local radiation with the received radiation received from the optical antenna; and a photodetector for optical-heterodyne-detecting the combined radiation. Also, this coherent CW laser radar apparatus is further arbandd by employing: as an electric component, a pseudo-random modulation signal generator for supplying a pseudo-random modulation signal to the optical modulator; a variable delay device for time-delaying a portion of the pseudo-random modulation signal generated from the pseudo-random modulation signal generator; a correlating device for multiplying the output signal of the photodetector by the pseudo-random modulation signal time-delayed by the variable delay device; and signal processing means for acquiring physical information such as a distance of the target and a velocity of the target based upon a intensity and a frequency of the output signal from the correlating device, and also the delay time set by the variable delay device. In this radar apparatus, an optical path between the optical components is constituted by an optical fiber. of sensing an encoding comprises the step of receiving an RF signal. 53. The method of claim 49 wherein the step of sensing an encoding comprises the step of receiving a microwave signal. 54. The method of claim 47 wherein the step of uniformizing the wavefront of said light source comprises the step of disposing an optical integrator in the path of said light source. 55. The method of claim 47 further comprising the step of polarizing said uniformized source beam. 56. The method of claim 47 wherein the step of modulating said spatial light modulator comprises the step of varying the on time of at least one element of said spatial light modulator. 57. The method of claim 47 wherein the step of modulating said spatial light modulator comprises the step of varying the drive signal provided to an element of said spatial light modulator. 58. The method of claim 47 wherein the step of directing said exposure beam comprises the step of magnifying said exposure beam. 59. The method of claim 47 wherein the step of directing said exposure beam comprises the step of demagnifying said exposure beam. 60. The method of claim 47 wherein the step of selecting an output format comprises the step of prompting for an operator response. 61. The method of claim 47 wherein the step of modulating said uniformized source beam within a spatial light modulator in accordance with said digital data is further conditioned by said digital data to provide an exposure beam capable of printing a plurality of images at the same time. 62. A method for printing as in claim 47 comprising: selecting a subset of individual modulator elements on said spatial light modulator proportional to said width dimension. 63. The method for printing as in claim 47 wherein the step of detecting comprises the step of manually entering encoded data. 64. An apparatus for printing images from digital image data onto a photosensitive medium disposed at an image plane, wherein said photosensitive medium presents, at said image plane, a width dimension that is selected from of a plurality of width dimensions, the apparatus comprising: (a) a media supply adapted to supply, at said image plane, said photosensitive medium having said width dimension; (b) a width detector for obtaining said width dimension of said photosensitive medium; (c) a control logic processor capable of controlling the operation of the apparatus for printing based on said width dimension obtained from said width detector and on said digital image data; and (d) an image forming assembly for directing, onto said photosensitive medium disposed at said image plane, an exposure beam for printing, said image forming assembly comprising: (1) a light source for providing light exposure energy for imaging onto said photosensitive medium; (2) a uniformizer for uniformizing said light exposure energy emitted from said light source; (3) a polarizer for filtering said uniformized light to provide a polarized beam having a predetermined polarization state; (4) a spatial light modulator having a plurality of individual elements capable of altering a polarization state of said polarized bea