KEYWORDS: Spectroscopy, Sensors, Digital micromirror devices, Mirrors, Diffraction gratings, Signal detection, Signal to noise ratio, Infrared spectroscopy, Digital Light Processing, Signal processing
Spectroscopic measurements have the potential to positively impact a wide range of research, development, monitoring and control applications. In many cases, this potential is not realized because the spectrometer cannot be brought out of the laboratory to the measurement site due to sensitivities to environmental factors, highly accurate data cannot be obtained in a timely manner, or customizing the spectrometer to a specific application is costly and precludes re-use of the device for other application once its original purpose is served. We present the development of a DLP-based spectroscopic system in the near-infrared that is low-cost, compact and rugged, provides high resolution and is highly adaptable through straightforward software control. The key elements of the design include an efficient and compact optical pathway, a high-resolution DMD controlled by a fast DLP board, and a user-friendly, feature-rich software package that facilitates system configuration and data analysis. The DMD replaces the detector array in traditional spectrometers, and is shown to provide greater functionality while eliminating the need for mechanical scanning. We demonstrate how the long, thin columns of mirrors in the DMD provide high wavelength selectivity and capture more light at each wavelength, increasing measurement SNR. Selectively activating columns of mirrors is shown to adaptively tailor the resolution and the wavelengths collected and analyzed by the system allow one device to meet the needs of many different applications and to reduce measurement times. The software interface developed for accessing the many features of the spectrometer is discussed.
KEYWORDS: Printing, 3D printing, Digital Light Processing, Digital micromirror devices, Control systems, Computer aided design, Control systems design, 3D modeling, Software development, Ultraviolet radiation
As 3D printer technology has rapidly developed and penetrated into a wide range of applications, several methods for creating 3D objects have been explored and developed. One such method utilizes UV curing of special resins, where the patterning of each layer of the 3D object is determined by a digital micromirror device (DMD) controlled by a digital light processing (DLP) system. This method possesses important advantages over other methods in terms of variable object composition, high spatial resolution, and reduced build times, but usually requires specialized knowledge to program and control the DMD and other printer systems. Not all potential users of 3D printers will be able or willing to acquire this knowledge in order to take full advantage of all that 3D printing has to offer in their ideas or applications. new software package called Design23DPrint has been developed that provides a user-friendly and intuitive interface for importing, manipulating, and editing 3D objects and has the ability to be readily interfaced with many different DLP and printer control systems. Both layer creation and the positioning of supports can be automated or be manually controlled. Integration of Design23DPrint with existing software packages for DMD control allows the user to edit layers on a pixel-by-pixel basis. The software was integrated with a new 3D printer design developed by Texas Instruments to demonstrate the capabilities of the software to control the printing process and to interface with resident control systems.
Digital micromirror devices (DMDs) are used in a variety of display and projection applications to produce high
resolution images, both static and animated. A common obstacle to working with DMDs in research and development
applications is the steep learning curve required to obtain proficiency in programming the boards that control the
behavior of the DMDs. This can discourage developers who wish to use DMDs in new or novel research and
development applications which might benefit from their light-control properties. A new software package called Light
Animator has been developed that provides a user friendly and more intuitive interface for controlling the DMD. The
software allows users to address the micromirror array by the drawing and animation of objects in a style similar to that
of commercial drawing programs. Sequences and animation are controlled by dividing the sequence into frames which
the user can draw individually or the software can fill in for the user. Examples and descriptions of the software
operation are described and operational performance measures are provided. Potential applications include 3D
volumetric displays, a 3D scanner when combining the DMD with a CCD camera, and most any 2D application for
which DMDs are currently used. The software’s capabilities allow scientists to develop applications more easily and
effectively.
KEYWORDS: 3D displays, 3D image processing, Projection systems, Digital Light Processing, Image processing, Image quality, Holography, Glasses, 3D volumetric displays
An ongoing public-private research partnership has demonstrated a three-dimensional (3D) volumetric display
system that incorporates a static image space. The 3D display system uses micro-electro-mechanical systems
(MEMS) based mirror arrays to direct infrared light beams into an image space that exhibits two-step, twofrequency
upconversion. A number of candidate image space materials have been evaluated, with 2%Er: NYF4
appearing to be most promising at this stage of the research. In this paper, the authors build upon prior work by
investigating the response time of 2%Er:NYF4. In addition, a new technique for reducing flicker in the 3D images is
described. The technique includes interlacing the 3D image slices in a way similar to the interlacing that occurs in
the generation of television images. Adopting this technique has the potential to reduce the flicker that is presently
evident, thereby improving the overall 3D image quality.
As three-dimensional (3D) techniques continue to evolve from their humble beginnings-nineteenth century stereo
photographs and twentieth century movies and holographs, the urgency for advancement in 3D display is escalating, as
the need for widespread application in medical imaging, baggage scanning, gaming, television and movie display, and
military strategizing increases. The most recent 3D developments center upon volumetric display, which generate 3D
images within actual 3D space. More specifically, CSpace volumetric display generates a truly natural 3D image
consisting of perceived width, height, and depth within the confines of physical space. Wireframe graphics enable
viewers a 360-degree display without the use of additional visual aids. In this paper, research detailing the selection and
testing of several rare earth, single-doped, fluoride crystals, namely 1%Er: NYF4, 2%Er: NYF4, 3%Er: NYF4 ,
2%Er:KY3F10, and 2%Er:YLF, is introduced. These materials are the basis for CSpace display in a two-step twofrequency
up-Conversion process. Significant determinants were tested and identified to aid in the selection of a suitable
medium. Results show that 2%Er: NYF4 demonstrates good optical emitted power. Its superior level of brightness makes
it the most suitable candidate for CSpace display. Testing also proved 2%Er: KY3F10 crystal might be a viable medium.
Conference Committee Involvement (10)
Emerging Digital Micromirror Device Based Systems and Applications XVII
28 January 2025 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XVI
30 January 2024 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XV
30 January 2023 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XIV
25 January 2022 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XIII
6 March 2021 | Online Only, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XII
4 February 2020 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications XI
5 February 2019 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications X
30 January 2018 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications IX
31 January 2017 | San Francisco, California, United States
Emerging Digital Micromirror Device Based Systems and Applications VIII
15 February 2016 | San Francisco, California, United States
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