2697379

Information

• Patent Grant
• 2697379

• References
• Source

• Patent Number

  2,697,379

• Date Filed

  Not available

• Date Issued

  Tuesday, December 21, 1954
  70 years ago

• CPC

  • G02B17/0626 - using three curved mirrors
  • G02B17/008 - Systems specially adapted to form image relays or chained systems
  • G02B17/0816 - off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry

• US Classifications

  • 359 - Optical: systems and elements
  • 352 - Optics: motion pictures
  • 353 - Optics: image projectors