I have for sale a very nice working Vintage Helium Neon Laser built by Scientifica & Cooke Limited 78 Bollo Bridge Road, LONDON, W3 8AU
It is designed to meet the requirements of educational departments. It is compact and its ruggedness makes it ideally suited to use in optical alignment work or as a reliable source of coherent light. It is fully contained with a built-in drive unit, DC exited, hot cathode plasma tube and multi-layer hard coated OC & HR mirrors forming a hemispherical cavity with collimated output, which gives a good stability using single phase 230vAC power. The mirrors and Brewster windows are sealed inside a clean air cabinet. The laser is supplied with a manual covering technical data and method of operation.
Laser will be sent, completely surrounded by soft packing material, in a 230mm (9") x 230mm (9") x 570mm (22.5") hard cardboard box with fragile tape all over it. It will be shipped by whatever method the buyer decides to pay for.
I WILL NOT send it via anything to do with parcelfa(o)rce as I may as well put a hammer through it now!
Below is a summary of the specifications:
Power Output: 1.0 mW @ 8mA
Wavelength: 6,382
Mirrors: Hard dielectric coating, finished to 1/10th of a wavelength
Configuration: One spherical and one plane mirror, forming a hemispherical resonator
Mounts: Precision machined from duraluminium with three screw adjustment
Resonator Length: Approximately 12.5"
Laser Tube: No. 2851
Construction: Silica Brewster windows with a standard helium-neon filling
Beam Polarization: Vertical to horizontal
Divergence: Approximately 0.8 milliradian
Diameter: Approximately 2.5mm at exit aperture
Power Requirements: 220 -240 Volts AC
Mounting: Provision for table and optical back mounting
Dimensions: 100mm (4") x 100mm 4" x 390mm (15") Long
Actual output power, using my Coherent thermal meter, was just under 1mW but it took a bit of mirror tweaking to get this and it seemed to drop off as it got warmer.
The front OC mirror looks to need a clean but I don't really want to attempt this on something so fragile. I will stick to the big Ion's to mess around with for doing that
Offers on this thread or via PM please.
Pic's below: