Accessory plate

From WebRef.org
Jump to navigationJump to search
  1. The quartz wedge inserted in the microscope substage above the polarizer in order to estimate birefringence and to determine optical sign of uniaxial minerals. CF: quartz wedge
  2. The selenite plate that gives the sensitive tint of a specimen between crossed nicols. Pryor, 3
  3. The mica plate that retards yellow light. Pryor, 3
  4. In polarized-light microscopy, an optical device that may be inserted into the light train to alter light interference after passage through, or reflection by, a crystalline material; e.g., quartz wedge, mica plate, gypsum plate, or Bertrand lens.
  5. In polarized-light microscopy, an optical compensator that may be inserted into the light train to alter birefringence after light passage through or reflection by an anisotropic material; e.g., quartz wedge, mica plate, gypsum plate, or Berek compensator. Syn: gips plate; glimmer plate; compensator. CF: Berek compensator; gypsum plate.
    Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: Dragon Professional Individual is Here!