Switch to photopia for your optical design

Reduce design and development cost.
Accelerate product development.
Deliver better products.
Use photopia.

Direct CAD Integration
for quicker iterations

solidworks certified solution partner Rhino logo

Photopia works directly inside of Solidworks and includes Rhino, giving you optical design tools direclty in your CAD package.

Lamp and Material Library
for improved accuracy

No more guessing at scatter coefficients or spending hours building a light source model.

Photopia has over 1440 materials and 1309 lamps you just pick from the library and drop onto your model.

Lower Cost for Quick ROI
save over 50%

With features that match or exceed our competitors at signficant cost savings, you'll have a better tool and save money for your organization, a win-win.

See how Photopia stacks up against the competition

Photopia Features Other Raytracing Software

Over 1309 fully measured lamp models by LTI Optics, including full color data

Not as extensive if included, or relies on a third party library, often not full color data

Over 1440 fully measured materials by LTI Optics

Typically not measured in-house and relies on third party data source

Relevant, standard compliant output, including IES and LDT files

Typically don't generate compliant IES files

Fast, millions of rays in minutes

Could take hours to trace 100,000 rays

Parametric Optical Design Tools

Rely on more user intervention

Optimization and full scripting capabilites in many languages, including Python, C#, and more

Optimization and scripting may use a limited, custom framework

Expert Customer Support from our Project Manager and Senior Optical Engineers

Often provided by junior engineers, not the product manager

You're in Great Company

The majority of the companies in the architectural lighting industry who sell performance driven products use Photopia for their optical design simulation.

Cooper Lighting
Acuity Brands
Hubbell Lighting

Indal Group
LG Electronics

R-Tech (Schreder)
Gerard Lighting
AB Fagerhult

Direct CAD Integration For Seamless Designs

Photopia runs completely inside of Solidworks and Rhino, giving you full optical simulation for Solidworks and Rhino.

For users of other CAD packages, Photopia for Rhino is perfect since it includes a copy of Rhino, which is an excellent surfacing tool, very useful when creating complex optical shapes. You can easily import and export native 3D solids from your main CAD package.

Direct Integration



Use Photopia for Rhino



PTC Creo




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rendering of color over angle simulation

An Extensive, Accurate Lamp Library

Photopia includes the most comprehensive library of lamps for the architectural lighting industry. The current library includes over 1309 source models with a large selection of LEDs, and also includes sun and sky dome models for daylighting device designs. This extensive library avoids the need for the user to create their own lamps and guess at their properties. Having accurate source models is essential to getting accurate simulations of the entire luminaire. Other programs that rely heavily on ray sets may not be as accurate as models in Photopia's library.

lamp and material library for raytracing

Fully Measured Material Properties

Competing software asks you to define BRDF data via parameters of various mathematical models, but knowing what parameters to set is an open question and even then, the scattering behavior of many materials isn't accurately represented by a mathematical function. Although some BRDF/BTDF data for standard materials is now being distributed by manufacturers, it is also very important that the optical software company is able to measure custom materials, such as formed aluminum with various levels of polish and anodizing processes. LTI Optics has provided this service since the late 1980’s, longer than any other company, and has more experience in characterizing the important optical properties of materials. Having measured BRDF/BTDF data for the actual materials used in your products is critical to being able to produce accurate simulation results.

BSDF data for library

Meaningful Output

Photopia provides a range of industry standard output right out of the box. You don't need to jump through hoops to generate standards compliant IES, EULUMDAT & TM-14 files, rather, Photopia creates these every raytrace. You'll get indoor and outdoor CU tables and plots, roadway iso-illuminance plots, a photometric report with detailed analysis results. You can view multiple illuminance planes along with candela distribution data after a single raytrace since our data collectors don't block each other.

False color showing RGB separation

Fast Raytraces

This is very important if you want a detailed evaluation of a design. We have several customers who previously used other optical software and they said it typically took several hours to trace 100,000 rays. Photopia can typically trace millions of rays in minutes and the speed is not linearly related to model complexity. Also, since some programs store all rays in memory, the max number of rays you can trace is a function of your system resources. For detailed candela distributions and illuminance plane data, you need to be tracing 5 to 10 million rays. Tracing an inadequate number of rays can lead to insufficient detail in the results and therefore an incorrect conclusion about the actual performance of the product.

Optical Design window inside of Solidworks for Fresnel lens Optical Design iside of Solidworks for PODT collimator

Optical Design Tools & Optimization

Photopia's Parametric Optical Design Tools (PODT) module provides an environment to design reflector and refractor geometry as native solids which are controlled by meaningful optical parameters. The PODT module has been developed as a direct result of LTI Optics’ own experience on optical design consulting projects over the past 30 years. The methodology used in these tools is therefore proven to produce results for a wide range of product types.

These tools are unique among all optical design software on the market, with other programs simply offering “optimizers” that attempt to optimize starting point geometry that the user provides. If parameters of that geometry can’t be modified to reach the desired goal, then they won’t converge on a design. The use of such optimizers is therefore strongly dependent upon the skill of the designer providing the starting point optical geometry, and often limited to assumptions, like a point light source. Photopia's PODT and optimization take into account the actual source size.

contact lti optics

Customer Support

LTI Optics puts a very high priority on customer support. The main person providing technical support to our customers is the lead designer for the Photopia software, its product manager since its inception, and our most senior optical designer. Many companies pass the job of technical support to a junior level employee. Having designed almost every type of luminaire within our industry, we have a clear understanding of the types of projects our customers are creating and can help them in a more meaningful way. Although we can't comment on how our competitors handle support since we have not been a customer of theirs, we can say that we get a lot of positive feedback on our support.

What our customers are saying:

"The speed of your responses and the thoughtfulness of your explanations has gone a long way towards helping me to better understand the workings of Photopia. Your dedication to customer service stands as an example that others should follow. Please extend my thanks to all.”

Serge Holoduke, The Light Factory

“We are very happy with the accuracy of Photopia. We have our own goniometer and have made many comparisons between the predicted and measured results. We have found Photopia to be so accurate that whenever we have seen a difference between the measured and predicted performance, our measurements have turned out to be wrong.”

Photopia User

"I have purchased and learned software for the past 10 years and I have never had the quality of tech support I received from Mark.”

Ken Osborn, Dir. of Engineering, PMC Lighting

“I've been a fan of Photopia for several years. It provides me with useful results within minutes which allows me to look at many design iterations in a short amount of time. I find it invaluable for refractors which are nearly impossible to prototype.”

Photopia User

"We've used Photopia for several years and believe it has been the second most important purchase made for product development, second only to to the purchase of an automated punch press.”

Photopia User