Press Release For More Information Contact: Barbara Calt, Director of Sales Lambda Research Corporation 25 Porter Rd. Littleton, MA 01460 Phone: 978-486-0766 Ext. 11 Fax: 978-486-0755 Email: bcalt@lambdares.com

Lambda Research Announces the Release of OSLO^® 6.4 for Windows^® and Linux platforms

Littleton, Massachusetts, May 24, 2006 -- Lambda Research Corporation, developer of optical software TracePro^® , TracePro Bridge™ for SolidWorks^® and OSLO, announces the latest release of the lens design software, OSLO. The 6.4 release of OSLO has over 40 additions and improvements over the previous 6.3.4 release.

Among the highlights of the new OSLO 6.4 release is the added capability to place multiple Interferogram (INT) files on any optical model surface. Interferogram files can represent a different source and type of error, e.g. freeform wavefront or surface deviations. Placing multiple interferogram files on a surface allows OSLO 6.4 to perform fairly complex tolerance modeling to predict the as-built performance of real optical systems. The attached diagram represents typical errors that might be modeled with separate interferogram files: (A) "print-through" errors of a lightweighted mirror, (B) atmospheric turbulence, and (C) the composite error that would be found in the as-built system when interferograms A and B are combined. OSLO’s implementation of separate interferogram files allows users to adjust the size and shape of individual errors in an easy and efficient way.

Another highlight of the OSLO 6.4 release is the addition of a new Anamorphic Asphere surface type that extends the standard optical surface sag equation differently in both the X and Y directions. This addition will allow users to optimize general anamorphic surface shapes without the control problems usually associated with spline surfaces. OSLO 6.4 has also added an automatic check to ensure that users choose catalog glasses within appropriate wavelength ranges for their models. As an example, users will now find it impossible to incorrectly use visible materials for infrared wavelength ranges.

With the 6.4 release, the Hikari, Hoya, Ohara, Schott, Sumita and Chengdu glass catalogs have been updated with new data. Hundreds of lenses have also been added to the vendor lens catalogs within OSLO, and data from many vendors such as Newport, Linos, CVI and Ealing have been updated. More robust ray tracing algorithms have been implemented for the case of severe offaxis rays entering a toric surface. The size of the text window and spreadsheet buffers have been increased from 2,000 to 4,000 lines and improvements have been made to the Linux version of OSLO to bring it closer to the same standard as the Windows version.

NEW PRODUCT ANNOUNCEMENT Release of OSLO^® 6.4

The 6.4 release of OSLO features over 40 additions and improvements. Among the highlights of the new OSLO 6.4 release is the added capability to place multiple Interferogram (INT) files on any optical model surface. Interferogram files can represent a different source and type of error, e.g. freeform wavefront or surface deviations. Placing multiple interferogram files on a surface allows OSLO 6.4 to perform fairly complex tolerance modeling to predict the as-built performance of real optical systems. The attached diagram represents typical errors that might be modeled with separate interferogram files: (A) "print-through" errors of a lightweighted mirror, (B) atmospheric turbulence, and (C) the composite error that would be found in the as-built system when interferograms A and B are combined. OSLO’s implementation of separate interferogram files allows users to adjust the size and shape of individual errors in an easy and efficient way. For more information, please visit www.lambdares.com .