UV and IR Exposure SYSTEMS

UV projector (or exposure) systems for additive manufacturing vary based on the power, resolution, wavelength and build-size of the exposure target. While most systems are based on UV wavelengths between 355 nm to 410 nm, new DLP chipsets support near-infrared (NIR) systems optimized at 1064 nm.


Static UV exposure systems are typically used in rapid prototyping machines and professional desktop 3D printers. We have a variety of options to meet different product requirements.


  • FLEXLIGHT LC4500-UV Up to 2 W of optical power at 405 nm
  • LUXBEAM LRS-HD and LRS-WQ Up to 7 W of optical power with a variety of lens options for pixel pitch from 1.9 μ to 130 μ .
  • FLEXLIGHT LRS-4KA Up to 5 W of optical power with integrated pixel shift.
  • FLEXLIGHT LRS-WQm Up to 3 W of optical power targeting more cost-sensitive markets.
  • FLEXLIGHT LC4710-UV Up to 2 W of optical power at 405 nm with full 1080P resolution. Coming soon!

A wide selection of lenses with different magnification and  LED wavelengths offer a multitude of system configurations, ranging from micro stereo-lithography to A4-sized build areas. For the LRS-4KA and LRS-WQm, we offer a complete API for different operating system platforms.

Dynamic (Scrolling)

Dynamic or scrolling-based applications are ideal for the LUXBEAM LRS-HD or LRS-MCx series projectors.  These projectors can be combined and synchronized with precise x or x-y scrolling motion systems. This allows you to scale up the total build area while maintaining the projector’s high resolution and high power output.

A wide selection of imaging lenses allows for single and multi-head configurations from micro-lithography to large-scale build sizes. These systems also offer the best output performance and contrast when using LED wavelengths under 385 nm.


High-Power NIR

We are currently developing high-power NIR projectors. Contact us for further information.



KEY Features

  • Up to 4.5 W Output Power
  • User controlled pixel shift supporting print features down to 35 u
  • Exposure area from 163 x 92 mm to 272 x 153 mm

This Ultra High Definition UV projector provides an outstanding combination of advanced DLP™ electronics and high-performance optics. Using Texas Instruments’ latest DLP660TE ™ DMD, this projector can display over 8 million pixels using a high-power LED source. Combined with dedicated UV optics and high-power UV LEDs, the LRS-4KA makes high-speed 3D manufacturing possible.

Designed specifically for stationary high-resolution stereolithography applications, the LRS-4KA will be a core element of the next-generation of 3D printers. By providing complete control of an integrated optical actuator, you can address 8.3 million unique pixel locations, enabling the manufacturing of extremely high-resolution parts.

The system comprises a UV-optimized optical system and a selection of UV LED light sources with optical output power up to 4.5 watts. The projector features a high-performance optical assembly from Visitech and is available with three different projection lens magnifications: 13x, 14x or 17x. The magnification of these lenses can be adjusted, allowing pixel sizes from 60 to 100 micron pixels, supporting build areas from 163 x 92 mm up to 272 x 153 mm and feature sizes as small as 30 microns.

Although the internal electronics were originally based on Texas Instruments’ reference design, Keynote includes significant improvements in our custom design:

  • Pixel-Pure Images: The LRS-4KA allows you to input your images at the precise resolution of the actual DMD chip (2 separate 2712 x 1528 images). Our custom chipset and firmware ensure that your data will never be scaled or resampled in any way! This prevents the scaling artifacts produced by TI’s standard firmware.
  • Precise Control of the Optical Actuator: The LRS-4KA gives you complete control over the timing of the optical actuator, allowing you to design your slicing algorithm to take advantage of the ultra-high def resolution in multiple ways.
  • High-Speed Flexible Architecture: The LRS-4KA electronics can be purchased separately. Since our design uses a flexible micro-coaxial cable to connect the control electronics with the DMD, it allows you to easily integrate our electronics with your own custom optics.

This flexibility enables an advanced and extremely competitive plug-and-play projector that allows customers to design, build and brand a rapid manufacturing machine with a very short time-to-market and with very low technical risk. Through the use of Texas Instruments’ reliable DLP660TE DMD technology, the DLP660TE DMD projector offers a long lifetime at a competitive cost.

For customers that want to use their own optics, Keynote Photonics offers an electronics-only solution: LC4K-EKT Controller.




  • Up to 2.5 W Output Power
  • 60 u to 80 u pixel pitch
  • 310 mm to 370 mm standoff distance

The LUXBEAM® LRS-WQm is specifically designed for implementation in compact, desktop-type 3D printing and additive manufacturing systems.

High resolution static configuration

With the UHD-resolution DLP660TE chip, the LRS-WQm offers over 4 million pixels native resolution and projects high resolution images with superior image quality. The system comprises an UV-optimized optical system and configuration with different LEDBEAM™ UV LED light sources, as well as a growing number of lens options with different magnifications.

The LRS-WQm controller electronics provide industry-proven reliability with industry standard data and communication interfaces.  It takes the needs of the desktop 3D print industries into consideration and offers superior quality and performance at competitive costs.


Luxbeam Rapid


  • Up to 7 W Output Power
  • Lens options support pixel pitch from 5.4 u and higher
  • Exposure area from 4.8 x 3.0 mm to 338 x 211 mm.

The LUXBEAM® Rapid System LRS-WQ is a DLP® based stereolithography sub-system specifically designed for professional 3D Printing and additive prototyping/
manufacturing systems. With the robust and reliable high resolution DLP9000 WQXGA chip, the LRS-WQ offers long lifetime and low maintenance costs. The system is configurable with numerous imaging lenses at different magnifications, providing anything from 1,9 micron native pixel pitch up to 130 micron in image, corresponding to an A4 sized build area.

Maximum optical power in image

The LRS-WQ comprises a UV-optimized optical system and a selection of different high power LEDBEAM™ UV LED light sources, ranging from 365 to visible blue 460 nm and providing up to 7 Watts optical power in the image. The LRS-WQ light engine is a proven and reliable plug-and-play system/module.  Status tracking  and control are provided through a standard ethernet interface which is accessible by web browser or API commands.




  • Up to 7 W Output Power
  • 2.7 u to 187 u pixel pitch (based on lens and DMD selection)
  • 5.2 x 2.9 mm to 359 x 224 exposure image size (based on lens and DMD selection)

The LUXBEAM®  LRS-HD is a DLP® based stereolithography sub-system, specifically designed for single head scrolling motion 3D Printing and additive manufacturing systems. With the robust and reliable high resolution DLP9500 chip, the LRS-HD variants (UV/HY/VIS) offer long lifetime and low maintenance costs at superior performance in wavelengths from 365 up to 460 nm.

Scalable build area with scrolling

The LRS-UV/HY/VIS uses the advantage of a scrolling motion projector to create a scalable build area and offers smart functions such as Sub-Pixelation (SPX) for resolution enhancement, and Pixel Power Control (PPC) for power uniformity to enable production of high resolution parts with superior building speed. The system is comprised of a UV-optimized optical system, a selection of different LEDBEAM (TM) UV LED light sources, and lens options for pixel size in image, ranging from 2.7 micron up to 187 micron pixel pitch.

LRS-MCx Multi-Core UV Projector


Offering the same performance as the LRS-HD light engines, the LUXBEAM® Rapid System LRS-MCx offers a integrated opto-mechanical design of multiple projection  modules for stitched images down to 50 micron pixel pitch in image. This allows for highest manufacturing throughput with single pass linear motion systems. Special alignment features grant pixel precise alignment of the modules and features the same robust and reliable high resolution DLP9500/DLP9500 UV chip-set. The water-cooled modules offers long lifetime and ultimate performance.


The LRS-MCx is a configurable system specifically designed for static and scrolling multi-head implementations in 3D Print systems. A typical implementation comprises at least two projection modules on a linear stage system. Standard configurations include LEDBEAM™ UV LED light source.

The UV-optimized optical system provides optimized power output for N-UV light sources. Multiple lens options support a wide  variety optimized power output for UV light sources. Up to 7 Watts of optical power per head is possible depending on the projection lens configuration.




  • Up to 2 W Output Power
  • DLPC350 Controller
  • 1.2 Throw Ratio, pixel pitch from X to Y

The FlexLight™ LC4500UV projector is a production-ready, full-featured implementation of the Texas Instruments DLP4500 chipset. This chipset includes the powerful DLPC350 processor and 0.45″ WXGA DMD with more than 1million pixels.

The LC4500UV provides a high resolution projector for your 3D measurement and display applications using the Texas Instruments DLP4500 chipset. An on-axis projection lens with a 1.2 throw-ratio provides excellent uniformity; and short focus capability enables a wide range of applications, starting with 3D printing.