SUPPLEMENTAL BALANCE SHEET INFORMATION (Details 2)	3 Months Ended
	Jul. 04, 2015
Photonics and Optics | All products other than filters, gratings, laser beam profilers, and dental CAD/CAM scanners
Warranty
Product warranty period	1 year
Photonics and Optics | Original equipment manufacturer | Minimum
Warranty
Product warranty period	15 months
Photonics and Optics | Original equipment manufacturer | Maximum
Warranty
Product warranty period	19 months
Optics | Filters and gratings products
Warranty
Product warranty period	90 days
Photonics | Laser beam profilers, and dental CAD/CAM scanners
Warranty
Product warranty period	2 years
Lasers | Minimum
Warranty
Product warranty period	90 days
Lasers | Maximum
Warranty
Product warranty period	2 years