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Note that this is the original bid package from 2001 May 13. Some details have changed vis-a-vis materials and parameters in consultation with the final vendors. It should, however, serve to give some idea of the optical specifications from the point of view of fabrication.
| Material: | UV-grade Fused Silica (Corning) |
| Surface: | Spherical Meniscus |
| Size: | 230x230mm |
| Thickness: | 6mm (center) |
| Coating: | TBD |
| Figuring: | SOML |
| Number: | 2 |
| Overall: | |
| Focal Length: | 700mm |
| Focal Ratio: | f/3.0 (imaging), f/2.5 (anamorphic) |
| Pixel Scale: | 0.13 arcsec / 15um pixel (imaging) |
| Field of View: | 6x6-arcmin |
| Aperture: | 420x300mm (disp x slit) |
| Design: | 3-element Decentered Maksutov-Schmidt |
| Figuring: | SOML |
| Number: | 2 |
| Primary Mirror: | |
| Size: | 620x360mm |
| Material: | Borofloat (Schott) |
| Type: | Gas-Diffusion Honeycomb (HEXTEK) |
| Facesheet: | 11mm thick |
| Cell Size: | 50x53mm |
| Mass: | 15kg |
| Surface: | Spherical |
| Coating: | Overcoated Silver (TBD) |
| Corrector Lens: | |
| Size: | 440x230mm |
| Material: | BK7 (Ohara) |
| Surface: | Aspheric (departure 720um) |
| Coating: | TBD |
| Flattener/Dewar Window: | |
| Size: | 175x116mm |
| Material: | NZK7 (Schott) |
| Surface: | Plano-Convex (spherical) |
| Coating: | TBD |
| Overall: | |
| Focal Length: | 700mm |
| Focal Ratio: | f/3.0 (imaging), f/2.5 (anamorphic) |
| Pixel Scale: | 0.13 arcsec / 15um pixel (imaging) |
| Field of View: | 6x6-arcmin |
| Aperture: | 420x300mm (disp x slit) |
| Design: | 3-element Decentered Maksutov-Schmidt |
| Figuring: | SOML |
| Number: | 2 |
| Primary Mirror: | |
| Size: | 620x360mm |
| Material: | Borofloat (Schott) |
| Type: | Gas-Diffusion Honeycomb (HEXTEK) |
| Facesheet: | 11mm thick |
| Cell Size: | 50x53mm |
| Mass: | 15kg |
| Surface: | Spherical |
| Coating: | Aluminum |
| Corrector Lens: | |
| Size: | 440x230mm |
| Material: | UV-Grade Fused Silica (Corning) |
| Surface: | Aspheric (departure 720um) |
| Coating: | TBD |
| Flattener/Dewar Window: | |
| Size: | 175x116mm |
| Material: | UV-Grade Fused Silica (Corning) |
| Surface: | Plano-Convex (spherical) |
| Coating: | TBD |
| Focal Length: | 3450mm |
| Size: | 490x490mm |
| Thickness: | 85mm |
| Surface: | off-axis paraboloid |
| Glass: | Borofloat (Schott) |
| Type: | Gas-Diffusion Honeycomb |
| Facesheet: | 11mm thick |
| Cell Size: | 50x50mm |
| Mass: | 17.5kg |
| Manufacturer: | HEXTEK, Inc. |
| Figuring: | SAGEM/REOSC |
| Number: | 4 |
| Type: | Reflection |
| Format: | Rectangular |
| Size: | 420x320mm |
| Thickness: | 50mm |
| Ruled Area: | 408x306mm |
| Ruling: | Resin Replica |
| Substrate: | Zerodur (Schott) |
| Coatings: | Enhanced Aluminum |
| Manufacturer: | Richardson Gratings |
| More Details | |
| Type: | Double-Pass |
| Format: | Oval |
| Size: | 330x300mm |
| Glass: | FuSi (Blue) TIH-6 (Red) |
| Coatings: | Silver (Red) Aluminum (Blue) |
| Manufacturer: | JML Optical Industries |
| More Details | |
| Size: | 420x320mm |
| Thickness: | 50mm |
| Glass: | Pyrex (Corning) |
| Flatness: | lambda/10 (rms) |
| Coating: | Aluminum (Blue Flat) |
| Silver (Red Flat) | |
| Figuring: | JML Optical Industries |
| Number: | 4 (2 each red & blue) |
| Size: | ... |
| Thickness: | ... |
| Glass: | FuSi |
| Coating: | Silver |
| Figuring: | JML Optical Industries |
| Number: | 2 |
| Size: | ... |
| Thickness: | ... |
| Substrate: | FuSi |
| Coating Type: | 34-layer dielectric |
| Cross-Over: | 565nm |
| Coating: | CSIRO |
| Figuring: | JML |
| Number: | 1 |
| Format: | Square |
| Size: | 86x86mm |
| Thickness: | 8mm max |
| Filter Sets: | SDSS ugriz |
| Format: | Rectangular |
| Size: | 182x86mm (disp x slit) |
| Thickness: | 8mm max |
| Filter Sets: | GG495 (red), UG5 (blue), ND1.5 (both) |