LGK7626, He Ne laser 50 mW, Siemens
Output Power: 4.5 mW minimum, 6.0 mW typical, 8.0 mW maximum.
Wavelength: 632.8 nm RED
Beam Diameter: 0.50 mm
Beam Divergence: 1.8 mRads.
Light Exit: Cathode end of tube.
Operating Voltage: 2490 VDC (with 75K ballast).
Start Voltage: 10KV.
Operating Current Range: 6 to 7 mA, 6.5 mA Ideal.
Recommended Ballast Resistor: 75K Ohms, 5 Watt.
(Add in series to the anode lead within 3″ of the tube.)
Recommended Power Supply: DG-22, E-21, LAB-S-22.
Dimensions: 13.8″ long x 1.42″ diameter. (350 x 36 mm)