Your source for optical design software and consulting.

Welcome to LTI Optics

LTI Optics is your resource for optical design consulting and optical design software. Photopia is the most widely used optical design software in the architectural lighting industry and contains tools to improve the design process and speed product development. Photopia also benefits from our experience as consulting optical engineers.


  • News:
    • Photopia 3.0.4 Update - We're happy to release Photopia 3.0.4, which has been sent to all customers that owned Version 3. This version has several fixes, including correct localization settings for international users and an updated library. If you didn't receive the update or would like to upgrade for Photoipa v3 please Contact Us. - 20 April 2009.
    • Rayset Lamp Models - We're happy to share some research about the use of rayset based lamp models and their accuracy in several types of optics. - 11 March 2009.
    • New Office - We're excited to announce that we've moved into a new office. Our phone # and email remain the same, but our address has changed. See our new location. - 23 January 2009.
    • Vista Installation - If you're installing on Vista, be sure to follow these directions. - 23 November 2008.
    • Photopia v3 Released - Tons of improvements to make Photopia easier to use than ever with an even larger library of lamps and materials. 10 November 2008.
    • New Website - We're proud to unveil our new LTI Optics website. 10 November 2008.