DLPA083B june   2019  – april 2023 DLP2000 , DLP2010 , DLP230KP , DLP230NP , DLP3010 , DLP3310 , DLP4620S-Q1 , DLP4710 , DLP471TP , DLP500YX , DLP5500 , DLP5530S-Q1 , DLP5531-Q1 , DLP5533A-Q1 , DLP6500FLQ , DLP6500FYE , DLP650LNIR , DLP670S , DLP7000 , DLP7000UV , DLP9000 , DLP9000X , DLP9000XUV , DLP9500 , DLP9500UV

 

  1.   Abstract
  2.   Trademarks
  3. 1Purpose and Scope
    1. 1.1 Limitations
    2. 1.2 Acronyms Used in This Document
  4. 2On-State Fill Factor
  5. 3Window Properties
  6. 4Mirror Diffraction Efficiency
    1. 4.1 Mirror Flatness
    2. 4.2 Mirror Diffraction Efficiency
    3. 4.3 Diffraction Efficiency with Mismatched Illumination and Projection f-numbers
  7. 5Mirror Reflectivity
  8. 6Estimating Overall DMD Efficiency
  9. 7References
  10. 8Revision History

2 On-State Fill Factor

Table 2-1 shows typical on-state fill factor based on DMD micromirror pitch.

  • Tilt angle - Nominal mirror tilt angle is listed. Each DMD data sheet specifies the actual tilt angle and how much it can vary.
  • Fill factor - The mirror array constitutes discrete micro-mirrors with a given mirror pitch. Fill factor is defined as the percentage of light reflected by the on-state mirrors when illuminated by a beam of light incident at 2x the mirror tilt angle with the assumption of 100% mirror reflectivity. For the actual mirror reflectivity, see Section 5. The mirror pitch, structure and tilt angle are directly related to the fill factor value. Geometrical ray trace simulation methods are used to calculate fill factor for DMD arrays.
Table 2-1 DMD On-State Fill Factor
DMD Examples (1) MICROMIRROR Pitch (µm) Nominal Tilt Angle (deg.) Illumination
f-number		 Typical On-State Fill Factor (2)(3)
DLP7000 13.68 12 2.4 92%
DLP650LE 10.8 12 2.4 92%
DLP780TE
DLP800RE		 9.0 14.5 2.0 97%
DLP3030-Q1
DLP5534-Q1
DLP4501
DLP9000		 7.6
7.6
7.56
7.56		 12 2.4 94%
DLP3010 5.4 17 1.7 93%
(1) DMD example list is not comprehensive and many other devices may be available within each micromirror pitch category.
(2) On state fill factor values are approximate. Refer to DMD data sheet for device-specific values.
(3) The on state fill factors are calculated using illumination at the native f-number corresponding to the tilt nominal angle.
  1. 12° tilt = f/2.4
  2. 14.5° tilt = f/2.0
  3. 17° tilt = f/1.7