Distance measuring module with a variable optical attenuation unit from an LC cell

Distance measuring module with a variable optical attenuation unit from an LC cell

  • CN 105,022,180 A
  • Filed: 04/15/2015
  • Published: 11/04/2015
  • Est. Priority Date: 04/23/2014
  • Status: Active Grant
First Claim
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1. a measuring equipment, especially tachymeter, laser scanner, contourgraph or laser tracker, described measuring equipment comprises electronic laser distance-measurement module, described electronic laser distance-measurement module comprises the optics sendaisle and receive optical passage that irradiate for laser measurement, wherein, the variable optical attenuation unit (100) being used for laser measurement and irradiating is set in described optics sendaisle and/or described receive optical passageIt is characterized in that,Described attenuation units (100) is irradiated (101) with the laser measurement be mapped in described attenuation units (100) and is undertaken constructing and designing by the mode that liquid crystal (LC) is decayed, and for this purpose, described attenuation units (100) at least comprises:

  • Polarizer (P), this polarizer (P) is especially designed to polaroid (P), particularly be designed to single-sided self film and adhesive bond is upper and/or be provided with anti-reflecting layer in one side to transparent carrier (GS), or it is cementing with described transparent carrier (GS)Liquid crystal shutter (L, L1, L2), this liquid crystal shutter (L, L1, L2) especially comprises nematic crystal, and this liquid crystal shutter (L, L1, L2) has the variable transmissivity (T) that can set, andFirst analyser (A1), this first analyser (A1) is especially designed to polaroid (A1), particularly be designed to single-sided self film and adhesive bond is upper and/or be provided with anti-reflecting layer in one side to transparent carrier (GS), or cementing with described transparent carrier (GS).

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