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| collimation testers |
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A collimated beam consists of plane wavefronts that neither converge nor diverge as spherical wavefronts do. Collimation is desirable for many types of optical testing and measurement. Control Optics Corporation offers two instruments for easily testing a beam for collimation: collimation testers Model JQG-1 and Model JQG-2.
The collimation tester uses a single glass plate (called a shear plate) to divide and recombine the beam. This produces an offset between two wavefronts. The shear plate is therefore a very simple interferometer (see Figure 1). When the beams are recombined, constructive and destructive interference between the two wavefronts leads to a series of bright and dark fringes. These fringes indicate whether the beam is parallel, converging, or diverging (see Figure 2). To make the beam parallel, simply adjust the collimation optics being used on the beam until the fringes line up with a preset reference line on a screen. The direction of misalignment determines the beam’s convergence or divergence. |
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| Figure 1 |
Figure2 |
This method is superior to estimating or measuring beam diameter over some range of distances, and then calculating divergence and comparing the results to expectation. |
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Control Optics USA
Address:1445 W Brooks St., Ste H, Ontario, Ca 91762
For sales please contact:
Dr. Norman (Waimin) Liu
Tel: 909.983.0788 Cell: 909.525.8666
Fax: 909.983.0791
Email: Waimin_Liu@Yahoo.com
controloptics@yahoo.com
Control Optics HongKong
Products:Yamamoto Laser eye Protection,
Scratch-Dig comparator
Collimation Tester.
Services area: Hong Kong, Taiwan, South Asia
Contacts inf.
Mr. Ying Biu Lam
Cell: +852.930.10593
Email:YBLam2001@Yahoo.com
Contacts in Shanghai:
Services area : China
Products served: Optical instrument, Yamamoto Laser eye protection
Scratch-Dig comparator
Contact information:
Prof. Jinwen Su
Cell: 86- 13916719148
Email: Jinwensu@yahoo.com
Control Optics USA
Address: 1445 W Brooks St., Ste H, Ontario, Ca 91762
For sales please contact:
Shukee Chau
Tel: 909.983.0788
Fax: 909.983.0791
Email: shukee@controloptics.com
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