LASERS ILLUMINATION

Brand	Owner	Address	Description
CAVITAR	Cavitar Oy	Kuokkamaantie 4 A Tampere 33800 Finland	Lasers for illumination [ and materials processing ] applications and not for medical use;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Laser lights having a plurality of wavelengths from DUV to VUV range are used to inspect defects of a pattern at high speeds and in a high sensitivity using high light-output lasers, while solving a temporal/spatial coherence problem caused by using lasers as light source. This reduces the laser light temporal/spatial coherence. Further, to correct chromatic aberration caused by illumination with VUV and DUD lights, the lights of the VUV and DUV wavelengths are arranged in a coaxial illumination relation. The chromatic aberration left uncorrected is detected such that a detection optical path is branched into two optical path systems corresponding to respective wavelengths and an image sensor is placed on an image plane of each wavelength.