Hene Laser and EHT PSU. Optics for YAG, Diode and DPSS on eBay (end time 09-Dec-09 22:44:57 GMT)


This listing has ended. Item:Hene Laser and EHT PSU. Optics for YAG, Diode and DPSS

Melles Griot HeNe Laser

With EHT PSU

And Many Other Optical Parts

This auction is for an ICL barcode scanner incorporating a Melles Griot hene laser with PSU and assorted optical parts as shown below. This unit is a gold-mine of parts for the laser experimenter, incorporating a laser and power supply, a rotating line-scan system, and several first-surface mirrors which are useful for this and other types of lasers, e.g. YAG, diode and DPSS. A high sensitivity photo-diode and many other useful optical and electronic parts are inside. To save on postage costs, we also offer the laser and high-voltage power supply separately. Please see our other auctions.

The laser will be tested prior to shipment. All other parts are "as-is" and NOT TESTED
To see our laser testing information page, please visit our shop.
The complete scanner unit may be in working order, but will NOT have been tested.

Some possible uses for the parts:

Experimental holography
Interferometery
Surface finish analysis
Lens testing / measurements
Spectrometer calibration
Measure the speed of light!

Important, please note: These units have come to us from a major UK retailer, where they were in daily use until a recent P.O.S. upgrade. The condition varies from reasonably clean, to rather dirty. The unit you receive may be a dirty one, but the laser will still have been tested. The optical parts shown below are protected by a sealed internal enclosure, and will be CLEAN, regardless of the external appearance of the unit.

The Laser

Laser Specifications:

Melles Griot Helium Neon
Power: typical 1mW, min 0.5mW
(Class 2A)
Wavelength 632.8nM
Power Supply Module:
Input: 24V d.c.
Output: 1.8KV 4mA (regulated)

Helium neon laser and HT power unit.

Laser unit operates with the following voltages applied:

Red: +24V (Pin A)
Black: 0V (Pin E)
Orange: 0V (enable, Pin B)
Yellow: N/C (Pin F)

The 1mW laser is a surprisingly powerful light source.

(Beam is made visible by dust in the air)

Close-up of the operating laser.

(Beam is made visible by dust in the air)

Beam Quality

Diffraction rings around a central spot are visible in this deliberately over-exposed photograph. The rings are clearly visible to the naked eye and are not an artifact of the camera lens. The laser was positioned 10 meters from the screen. The central "dot" is approximately 15mm diameter.

These rings are a demonstration of the superb optical quality of the beam. Diode lasers rarely have the beam quality required to do this, due mainly to the poor quality of the collimation lenses in common use.

With care, helium neon lasers can be used for holographic experiments. The high beam quality and single-line output spectrum are necessary parameters for this application. Diode lasers are not usually suitable for the production of holograms.

The Optical Parts

Assorted Optical Parts: First-surface mirrors: five flat (one on adjustable mounting) First-surface dichroic mirrors: one flat and one concave. Lens: red for focusing a hene beam Beam collimator **Dichroic mirrors are wavelength selective	Assorted optical parts, seen in more detail below (Click to view high-resolution image)
Two first-surface flat mirrors, the one on the right has an adjustable mounting.	One of three more mounted first-surface flat mirrors
A concave, dichroic first-surface mirror. Designed to focus the hene beam while allowing unwanted wavelengths to pass through.	Another view of the dichroic concave mirror showing the focusing effect. (colour is NOT false)
A flat, dichroic first-surface mirror in a fixed mounting	A red filtered convex focusing lens
The beam collimator lens assembly.

The Scan Motor, CPU and PSU

Scan System: Line-scan: Pentagonal rotating mirror Compound scan: 3- axis deflection Motor Assembly: 15V d.c. powered Brushless multipole design 600KHz resonator controlled clock CPU Card: Hitachi 63C09 27C512 EPROM 40MHz clock module HP 4502 opto-isolators System PSU: Power input: 220-240V AC Outputs: +5V, +12V, -12V, +15V, +26V Style: Custom, open frame module	Line-scan motor with pentagonal mirror
	Underside of line- scan motor showing control electronics
The CPU card	The photodiode which is located on the CPU card
This is the system PSU. An off-line switched-mode unit with multiple outputs.

The Complete Scanner Unit

Scanner Specifications:

Scan system: multi-axis laser
Laser type: Helium Neon (HeNe)
Computer Interface: **not known
Supply: 220-240V 50Hz, 35W max.
Dimensions: 300 x 220 x 80mm
Weight: 5.0Kg

Please note: The operation of the complete scanner is not tested and cannot be guaranteed.

Sold for the laser and other optical parts ONLY.

View with all covers in place.

Internal view - click to view high resolution image

* IMPORTANT INFORMATION *

This auction

This auction is for an item similar to that shown above. The serial number supplied may not match that shown.
International postage costs vary, please enquire for details.

Terms of Sale

Visit our shop for contact information, terms of business, and other items offered for sale.

Please read our terms and conditions BEFORE you bid.

Postage and packaging

Item location: Hook, United Kingdom

Dispatches to: Worldwide

Quantity: Change country:	Postcode:

Postage and packaging	To	Service	Estimated delivery*
£12.00	United Kingdom	Seller's Standard Rate	Varies

*The estimated delivery time is based on the seller's dispatch time, the postal service selected, and when the seller receives cleared payment. Sellers are not responsible for shipping service transit times. Transit times may vary, particularly during peak periods.

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