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Although HeNe gas lasers offer exceptional reliability and optical quality, users are quickly replacing them in their OEM applications with semiconductor laser diode technology. Laser diode modules offer many physical and electronic advantages over HeNe lasers. HeNe gas lasers provide superior...

...of the presence of astigmatism (see Diodes vs. HeNe). The output power specified is the maximum power value of the laser light after the beam exits the laser housing; in other words, power is rated after passing through (but not before) any optics. Values stated are typically within +/-10%. The light...

A ballast resistor is a mechanism placed in series with a HeNe gas laser anode. The unit works to promote a stable electrical discharge and to prevent the laser from oscillating. The rating of the ballast resistor must be high enough to stop the oscillation, yet low enough to prevent unnecessary...

A helium-neon (henceforth abbreviated HeNe) laser is basically a fancy neon sign with mirrors at both ends. Well, not quite, but really not much more than this at first glance (though the design and manufacturing issues which must be dealt with to achieve the desired beam characteristics, power...

Laser Objectives are designed for HeNe lasers (632.8nm) and provide the smallest spot sizes possible. Choosing the correct pinhole and objective combination will yield optimal results. The following equations were used to determine the values for the Aperture Selection Chart....

Matrix S200 metrology systems for CMP and etch provide application-specific sets of metrology techniques. The S200 CMP system has a 5 ' 10-mm-spot, 633-nm HeNe laser ellipsometer for measuring on-product substrate n and k and a 2.5-mm-spot, 470 905-nm reflectometer for measuring film thickness...

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  • Combining the Best of Two Worlds: Nanoparticles and Nanofibers
    … b) Confocal laser scanning microscopy (CLSM) image of nanofibers with up-conversion excitation at 633 nm.[42] c) Photograph of a fiber mat under illumination of a HeNe laser (l=633 nm) showing … … green spot).[42] d) Schematics describing the strategy of …
  • Study of wave motion on tubulars using broad-band laser ultrasound
    As shown in the schematics in Fig. 5, the main components of the sys- tem include a generation subsystem consisting of an Nd:YAG laser and focusing optics, a fiber-tip … … de- tection subsystem powered by an HeNe laser, a photode- tector …
  • Photonics laboratory with emphasis on technical diversity
    Specific equipment: low-power HeNe laser (could be any source, really), fiber chucks, fiber-chuck holders, microscope objective, photodetector and amplifier … … strictly necessary but very helpful), bit-error-rate tester (built in house for about $40, schematics available), vibration-isolated table …
  • Lasers and fiber optics in medicine
    Optical schematics of some types of gas discharge lasers with fixed and slightly tuning wavelengths are represented on Fig.3—5. Very promising for laser diagnostics and therapy are CW HeNe lasers.
  • Spatially indirect excitons in coupled quantum wells
    by a HeNe laser and at an excitation intensity ~0.1 W/cm2 . Figure 4.17 Schematics of the indirect exciton dispersions: (left) at zero and finite in-plane magnetic …
    The schematics are given in Figure 5c. As light source we used HRP050 HeNe laser from Thorlabs with a wavelength of 632 nm and a power of 5.0 mW.
  • Refractive statistical concave 1D diffusers for laser beam shaping
    Schematics of the goniophotometer setup. The laser source is a HeNe laser (632.8 nm, 15 mW) with a beam diameter of 3 mm.
  • Thermal lens measurements in Yb-doped YAG, LuAG, Lu2O3, Sc2O3 ceramic lasers
    (a): Pump source: HeNe laser ; Pump laser: CW fibre-coupled diode laser at 936 nm; DM: dichroic mirror; EM: End cavity mirror; M1: flat mirror; M2:spherical mirror (focal length 100 mm); OC: output coupler mirror. (b): Schematics of the probe beam path between the sample and the sensor. .
  • Hybrid servo design for large area nano pattern stitching
    Fig. 1 shows the schematics of the measurement system and the positioning stages. The measurement system contains a Agilent 5517D HeNe laser , three high stability plane mirror laser interferometers, 10706B, three laser signal receivers, and two plane mirrors that are placed perpendicular to each other.
  • Power Supplies - High Voltage, page 2
    Links to electronic circuits, electronic schematics , designs for engineers, hobbyists, students & inventors: HeNe Laser Power Supply (Aaron Cake) -  If you have ever worked with lasers, you know how fun and interesting it can be, you also know how expensive it can be.

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