OFR LMU UV Achromatic Objective

OFR Globe

Intro

AR Coating

*Back*	*Next*

OFR's all-refractive UV Achromatic MicroSpot Focusing Objectives are designed for use with high power, UV excimer lasers and other ultraviolet sources.

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 for 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 Vol. 1835, Proceedings, Nov. 1992 Boston Conference
"Improvements in Crystal Optics for Excimer Lasers"
Toepke, D. Cope, Harshaw/Bicron Crystal Products Group

Specifications
Materials	Excimer-Grade Fused Silica Excimer-Grade Calcium Flouride
Design Spectrum	193 - 450 nm
Energy Throughput	96 - 98%

LMU UV Objective

Equipped with the universal standard
Royal Microscope Society (RMS) thread
(Whitworth 0.8" x 36 TPI).

UV MicroSpot Focusing Objective
Catalog Number	Working Distance	EFL	NA	Theoretical Focus Spot	Entrance Aperture	D	L
LMU-3X-λ	49 mm	60 mm	0.08	5 µm*	10 mm	21 mm	26 mm
LMU-5X-λ	35 mm	40 mm	0.13	3 µm*	10 mm	21 mm	24 mm
LMU-10X-λ	15 mm	20 mm	0.25	2 µm*	10 mm	21 mm	32 mm
LMU-15X-λ	8.5 mm	13 mm	0.32	1 µm*	8.5 mm	21 mm	36 mm
LMU-20X-λ	4 mm	10 mm	0.40	1 µm*	8 mm	21 mm	35 mm
LMU-39X-λ**	2 mm	5 mm	0.50	1 µm*	5 mm	21 mm	34 mm
LMU-40X-λ	1 mm	5 mm	0.50	1 µm*	5 mm	21 mm	34 mm
LMUL-20X-λ	19 mm	10 mm	0.40	Discuss	8 mm	See drawing
When ordering, specify coating according to wavelength and power rating by adding the appropriate coating code, for example, LMUL-20X-266 or LMU-10X-UVB. * Note that Theoretical Focal Spot Diameter values are based on a Gaussian profile input beam at Design Wavelength which fills the Entrance Aperture at the 1/e2 limits. ** Optimized for use 325 - 650nm. Inquire for coating options. † ZERO-POWER ACHROMATIZER available, See page 7.

Antireflection Coatings
Narrowband AR Coatings
Center Wavelength	Bandwidth	Max Reflection per Surface	Power Handling
193 nm	192 - 194 nm	< 1.5%	100 MW/cm²
248 nm	240 - 260 nm	< 0.5%	200 MW/cm²
266 nm	255 - 280 nm	< 0.35%	500 MW/cm²
351/354 nm	340 - 370 nm	< 0.25%	500 MW/cm²

Broadband AR Coatings
Coating Code	Bandwidth	Max Reflection per Surface	Power Handling
UVB	240 - 360 nm	1.5%	50 MW/cm²
NUV	325 - 500 nm	1%	50 MW/cm²

Optics for Research · Ph 973-579-7227 · Fax 973-300-3600 · Email: info@ofr.com