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.

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  • News:
    • Photopia 3.1.5 Update - Photopia 3.1.5, which has been sent to all ADUP Customers, fixes several bugs and includes the new Parametric Refractor Design Tools and an updated library. - 20 July 2010.
    • Photopia 3.1.1 Update - Photopia 3.1.1, which has been sent to all ADUP Customers, fixes several bugs and includes the new Parametric Refractor Design Tools and an updated library. - 27 January 2010.
    • Photopia 3.1 Update - We're happy to release Photopia 3.1, which has been sent to all ADUP Customers. This version includes the new Parametric Refractor Design Tools and an updated library. If you didn't receive the update or would like to upgrade to Photoipa v3 please Contact Us. - 11 January 2010.
    • Windows 7 and Vista Installation - If you're installing on Windows 7 or Vista, be sure to follow these directions. - 7 December 2009.
    • Photopia 3.0.6 Update - We're happy to release Photopia 3.0.6, which has been sent to all Maintenance Customers. This version includes several new features and a new daylighting based tutorial. There are also many fixes and an updated library. If you didn't receive the update or would like to upgrade to Photoipa v3 please Contact Us. - 16 September 2009.
    • Photopia 3.0.5 Update - We're happy to release Photopia 3.0.5, which has been sent to all Maintenance Customers. This version makes designing LED collimators easy with new features and a new tutorial. There are also many fixes and an updated library. If you didn't receive the update or would like to upgrade to Photoipa v3 please Contact Us. - 10 July 2009.
    • Lightfair 2009 - We will have a booth at Lightfair in NYC this year and we'd encourage you to stop by and see what is new with Photopia. Our booth is #1902, and is just inside the right entrance. - 24 April 2009.
    • 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 to 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.
    • 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.