3674334

Information

• Patent Grant
• 3674334

• References
• Source

• Patent Number

  3,674,334

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1972
  52 years ago

• CPC

  • G02B17/0636 - off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry
  • G02B17/0626 - using three curved mirrors
  • G02B17/0631 - on-axis systems with at least one of the mirrors having a central aperture

• US Classifications

  • 359 - Optical: systems and elements