*Sub Menu l

UV Achromatic objectives / High power YAG laser objectives

Lasers Optics

Microspot Focusing Objectives

UV Achromatic objectives

All-refractive UV Achromatic MicroSpot Focusing Objectives are designed for use with high power, ultraviolet sources.
SPECIFICATIONS
Materials Design Spectrum Energy Throughput	Excimer-Grade Fused Silica Excimer-Grade Calcium Fluoride 193 nm to 450 nm 96-98%

Lens elements comprising the LMU Objectives are made from the highest quality, lowest absorption excimer grade fused silica and CaF2 available, For information on material testing under high power UV radiation, the following are recommended :

. “Optical Materials Excimer Laser Applications”
. M. Rothschild, Optics & Photonics News, May, 1993
. “Long-Term Effects of Pulsed KrF Laser Radiation on
. Crystalline and Amorphous SiO2”. D.J Krajnovich,
. I.K.Pour, SPIE Vol. 2114, Proceedings, 1993 Boulder
. Damage Symposium
. “Excimer Lasers : Applications, Beam Delivery Systems
. and Laser Design”SPIE VoI. 1835, Proceedings, Nov.
. 1992 Boston Conference
. “Improvements in Crystal Optics Excimer Lasers”
. Toepk, D. Cope, Harshaw/Bicron Crystal
. Products Group

Lasers Optics

Microspot Focusing Objectives

High power YAG laser objectives

High Power Nd:YAG Microspot Focusing Objectives are designed to transmit and focus the high power radiation emitted by industrial Nd:YAG lasers.

Materials	Energy Throughput	Coating	Damage Threshold
Fused Silica	>96-98% within design spectrum	High power damage-resistant, multilayer antireflection coating optimized for 532 nm or 1064 nm. Other coatings available upon request.	500 MW/cm2 NOTE:Power rating based upon 20n-s pulses, 20 Hz, 532 nm or 1064 nm.

Use outside Design Spectrum

The High Power Nd:YAG Objectives are designed for diffraction-limited performance at 1064 nm. Near-diffraction limited performance can be achieved outside the design spectrum, including the visible spectrum. Inquire. Focal length at 532 nm is 2% shorter than at 1064 nm.

*Note that Theoretical Focal Spot Diameter values are based on a Gaussian profile input beam at Design Wavelength which fills the Entrance Aperture at 1/e2 limits.