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Vol. 8, issue 11, article # 16

pdf Etsina A. L., Butenko L. N., Etsin I. Sh. Laser beam divergence meter. // Atmospheric and oceanic optics. 1995. V. 8. No. 11. P. 1658-1661.
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Abstract:

We have developed a beam angular divergence meter with a CCD camera intended for testing beam quality of UV excimer lasers. Maximum diameter of the laser beam is 110 mm. The resolution of the instrument corresponds to the diffraction limit. The wavelength region is within the range from 200 to 1100 nm. Preliminary testing of the meter has been carried out using a commercial repetitively pulsed nitrogen laser of ILGI-503 type and a cw He-Ne laser of LGN-105 type. Operation of the instrument was demonstrated to be satisfactory for both cw and pulsed operating modes.