D.W. Mann Co. 20µ Precision Optical Slit Assembly Spectrometer Optical Bench Dovetail Mount
- Auction No.:
- 16303
- Starting Bid:
- $80.00 Reserve not met
- Location:
- Chandler, AZ - US
- Seller:
- Dave Schreiner
- Started:
- 06/06/2026 11:40PM
- Ends:
- 06/16/2026 11:40PM
- Shipping:
- Buyer pays shipping
- Payment:
- Personal or Cashier's Check, Money Orders, Instance Cash Wire Transfer, Cash
- Hits:
- 28
Identification
D.W. Mann Co. 20 Micron Precision Optical Slit
- Manufacturer: D.W. Mann Co., Lincoln, Massachusetts
- Slit width: 20 µm (20 microns)
- Housing size: 3¼” × 3¼” square
- Mount: 2” long dovetail, 5/8” wide × 5/8” high
- Construction: Black anodized aluminum with precision-machined slit blades
What it was used for
This type of component would slide into an optical bench or spectrometer carriage and provide an extremely narrow light source for:
- Spectroscopy
- Diffraction experiments
- Interferometry
- Monochromators
- Laser beam shaping
- University physics labs
- Research optical systems
The 20 µm slit is very narrow—about one-quarter the thickness of a human hair—indicating a scientific/research-grade optical component.
Condition
From the photos:
- Slit appears intact.
- Housing shows normal handling scratches.
- Dovetail mount appears undamaged.
- Engraving is clear and legible.
- Internal slit edges appear clean.