Optical design information is provided in this section. Some files are available in other formats, see this direct folder link to browse many files. The list below shows some of the files which are available when you browse…

Primary Mirror

• Diameter: 90.00“ ± 0.0625” (2286 mm)
• Central Obscuration Diameter: 33.5“ ± 0.1” (851 mm)
• Conic Constant: -1.0646 ± 0.001
• Radius of Curvature: 12281 mm ± 4 mm
• Uncorrected Focal Length: 6140.5 mm
• Uncorrected Focal Ratio: f/2.69
• Measurement of the 90-inch Primary Mirror Optical Prescription

Corrector Optics

• Corrected Focal Length: 6829.2 mm
• Corrected Focal Ratio: f/2.98
• Optical Design and Specifications for the 90-inch Prime Focus Corrector (Rev E-2)
• Corrector Design Tolerances
• AR Coating Theoretical Reflectance
• AR Coating Measured Reflectance:
• Both Sides
  • AR Coating Measured Reflectance: Side 1
  • AR Coating Measured Reflectance: Side 2

• Vignetting Effects
• Ghost Analysis for the 90'' Prime Focus Corrector
• 90-Inch Prime Focus Corrector Lens 1 Testing Report (Michael Tuell)
• 90-Inch Prime Focus Corrector Lens 3 Testing Report (Michael Tuell)
• Corrector Optics Defects
  • Lens 2 and Lens 3 Defects
  • Lens 2 Defects
  • Lens 3 Defects
• Unordered List ItemL2 asphere profile measurements (Steve Miller; SO Mirror Lab)

Baffles

• See Baffle and Baffles
• Inner Lens Can Baffling
• External Lens Can Baffling
• Baffling Inner Lens Can Baffling
• External Lens Can Baffling

Drawings

• Optics with dimensions & header
• Optics with dimensions & without header
• Optics without dimensions & without header