X hits on this document

PDF document

DLP® Discovery System Optics Application Note - page 3 / 38

89 views

0 shares

0 downloads

0 comments

3 / 38

1 2

3

4

5

2510332 - February 2009

Table of Contents

Overview of DMD Use in Projection Optical Systems .................................................................4 Projection Optical System Architectures .....................................................................................5

    • 2.1

      Telecentric Architectures...........................................................................................................5

      • 2.1.1

        Advantages of Telecentric Architecture.........................................................................6

      • 2.1.2

        Disadvantages of Telecentric Architecture ....................................................................8

    • 2.2

      Nontelecentric Architectures .....................................................................................................9

      • 2.2.1

        Advantages of Nontelecentric Architecture .................................................................10

      • 2.2.2

        Disadvantages of Nontelecentric Architecture.............................................................11

Projection Optical System Design Considerations ...................................................................14

    • 3.1

      Illumination-System Components and Design Parameters.....................................................14

      • 3.1.1

        Lamp............................................................................................................................14

      • 3.1.2

        Reflector ......................................................................................................................15

      • 3.1.3

        Color Wheel.................................................................................................................16

      • 3.1.4

        Integrator .....................................................................................................................17

      • 3.1.5

        Relay/Folding Optics ...................................................................................................19

      • 3.1.6

        TIR Prism.....................................................................................................................20

    • 3.2

      Projection-System Components and Design Parameters .......................................................21

System Performance Tuning Tips and Techniques...................................................................24

    • 4.1

      Contrast Ratio .........................................................................................................................24

      • 4.1.1

        Illumination Angle ........................................................................................................24

      • 4.1.2

        Mirror Gap ...................................................................................................................27

      • 4.1.3

        Numerical Aperture......................................................................................................28

      • 4.1.4

        Optical Design and Coating Quality.............................................................................28

    • 4.2

      Lumens....................................................................................................................................29

    • 4.3

      Optimizing Optical Costs .........................................................................................................29

      • 4.3.1

        UV Filtering..................................................................................................................29

      • 4.3.2

        Tolerancing..................................................................................................................30

      • 4.3.3

        Throw-Ratio and Offset Optimization ..........................................................................30

      • 4.3.4

        Image Quality ..............................................................................................................32

Alternate Light Sources and Systems ........................................................................................32

    • 5.1

      LED Sources ...........................................................................................................................32

      • 5.1.1

        Projection Optical System Using LED’s.......................................................................34

    • 5.2

      Laser Sources .........................................................................................................................36

    • 5.3

      Non-Imaging or Non-Projection Applications ..........................................................................38

May not be reproduced without permission from Texas Instruments Copyright 2009 Texas Instruments Incorporated

3

Document info
Document views89
Page views89
Page last viewedWed Dec 07 20:59:54 UTC 2016
Pages38
Paragraphs811
Words14999

Comments