公开(公告)号：US06928093B2

公开(公告)日：2005-08-09

申请号：US10712545

申请日：2003-11-13

申请人： R. Kyle Webb ,  Scot T. Smith ,  Roy Luoma

发明人： R. Kyle Webb ,  Scot T. Smith ,  Roy Luoma

IPC分类号： H01S3/00 ,  H01S3/036 ,  H01S3/134 ,  H01S3/225 ,  H01S3/23 ,  H01S3/10

CPC分类号： G03F7/7055 ,  H01S3/0057 ,  H01S3/036 ,  H01S3/134 ,  H01S3/225 ,  H01S3/2251 ,  H01S3/2258 ,  H01S3/2333 ,  H01S3/2366

摘要： A method and apparatus for laser light pulse stretching is disclosed which may comprise a beam splitter in the path of a laser output light pulse beam; selected to pass a first percent of the energy of a first input pulse of the laser output light pulse beam along a laser output light pulse beam output path as a first output pulse and to reflect a second percent of the energy of the laser output light pulse beam into a first delayed beam; an optical delay path receiving the first delayed beam and returning the first delayed beam to the beam splitter in an orientation such that a third percent of the first delayed beam is reflected into the output path as a second output pulse and a fourth percent is passed into the optical delay path as a second delayed beam; the optical delay path receiving the second delayed beam and returning the second delayed beam to the beam splitter in an orientation such that the third percent of the second delayed beam is reflected into the output path as a third output pulse and the fourth percent of the second delayed beam is passed into the optical delay path as a third delayed beam; the optical delay path receiving the third delayed beam and returning the third delayed beam to the beam splitter in an orientation such that the third percent of the third delayed beam is reflected into the output path as a fourth output pulse; the first input pulse being a first pulse in a plurality of pulses output from a prior pulse stretcher, each of a plurality of succeeding input pulses comprising the output of the prior pulse stretcher resulting from the stretching of a narrow band laser light output pulse, forming successive first, second, third and fourth output pulses, the combination of which forms a pulse stretcher having an output with TIS of at least 200 ns. The optical delay path may be formed of a plurality of at least eight reflecting mirrors and contained in an elongated enclosure having first and second end plates mounting a first group of at least four of the at least eight reflecting mirrors mounted on the first mounting surface symmetrically about a center axis of the optical delay path and a second group of at least four of the at least eight reflecting mirrors mounted on the second mounting surface symmetrically about the center axis. The mirrors may be staggered in a predefined pattern, e.g., a circular pattern. The delay path may lie in a plurality of planes. The apparatus may be part of a laser system, part of a beam delivery system or an interface between the two.

公开(公告)号：US06995359B1

公开(公告)日：2006-02-07

申请号：US10457035

申请日：2003-06-11

申请人： Eric A. Hillenbrand ,  Roy Luoma ,  R. Kyle Webb

发明人： Eric A. Hillenbrand ,  Roy Luoma ,  R. Kyle Webb

IPC分类号： G01N21/35

CPC分类号： G01J5/522 ,  G01J3/02 ,  G01J3/0232 ,  G01J3/0286 ,  G01J5/62

摘要： A calibration method for radiometric imaging systems that relies on an absolute measurement of scene radiance (thereby requiring a baseline measurement of zero radiance), and a shutter assembly for taking the baseline measurement of zero radiance which is operable under cryogenic temperatures as low as 80.5K (−192.65° C.) in vacuums measuring

摘要翻译： 用于放射成像系统的校准方法，其依赖于场景辐射的绝对测量（从而需要零辐射的基线测量），以及用于进行零辐射基线测量的快门组件，该低温可在低于80.5K的低温 （-192.65℃）在测量<10 -6乇（mm Hg）的真空中。 快门组件通常包括致动器和快门机构。 致动器优选地是能够在极端环境（例如，<10 -6托的真空度，低于90K的温度）下操作的微型螺线管组件。 快门机构优选地包括单个快门叶片，并且当经受极端环境时也能够操作。 使用快门组件的方法为红外成像系统提供零辐射参考测量，从而提供可以确定绝对场景辐射的基础。