| Item | Part # | Size | Vendor | Cost | Comment |
| Thermoplastic plate | HC-301 | For HC-300 holocamera | NRC | sold | good condition |
| Reference Flat | - | 3.5" dia. | Photo | sold | 1/20 wave flat dual sides |
| Slit lamp replacement bulb | 900-930 Haag-Streit | 6v 4.5A/27W(specs) | Haag-Streit | $15 | new from old stock |
| Dispersion/diffuser plate | 39-0023 (specs) | 85mm x 85mm | Linos Photonics | $10 | new |
| Trihedral Prism Retro-reflector | Protected silver reflector with copper/black paint backing | 63mm dia. x 42mm high | 1/8 wave flat, 3 arc sec | sold | new |
| Half-wave plate 670 nm | NHM-200-670 | 2"OD, 1.2" CA (specs) | Meadowlark Optics | $300 | no sign of use |
