These are lightly used, Helium Neon laser heads for your OEM replacement or experimental needs. Other types of heads may be available. Please call or email for more information. Specifications:

MFG / Model: Melles Griot 05-LHP-123-496 Output Power: 1.8 mW minimum, 2.4 mW typical Wavelength: 632.8nm RED Polarization: Linear, 500:1 Mode: TEMoo Beam Diameter: 0.63 mm Beam Divergence: 1.28 mRads. Aperture Mount: 4x 4-40 tapped holes, 25.4 mm square spacing. Operating Voltage: 1750 VDC. Start Voltage: 10 KV. Operating Current: 6.5 mA Input Lead: Male Alden connector with a 229 mm long cord. (extension cord available) Recommended Power Supply:  LAB-S-22, DG-22, E-21, F-22. Dimensions: 272 mm long x 44.5 mm diameter. Warranty: Limited 30 days from date of purchase.