Trapezoidal Distortion in Projected Images

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 77, No. 6, pp. 637–639
Abstract: Trapezoidal distortion results when the projector lens axis and the screen axis do not coincide. Their difference is axial displacement which can be measured in degrees of arc or as the linear difference between the optimum and actual projector positions. The increased use of rear-screen systems with a shortened throw and two or more projectors makes the determination of the axial displacement limit a prime consideration in the system design. Using throw, screen width and axial displacement as independent variables, equations have been developed to permit specification of the trapezoidal distortion as a percentage of the projected image dimension. Based upon visual acuity criteria, it is recommended that 2% would be a reasonable maximum limit.
Publication Date: 1968-06-01
DOI: 10.5594/J05812
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J05812
Author(s): Albert L. VenningLockheed Missiles & Space Co., Motion Pictures 23-10, P.O. Box 504, Sunnyvale, Calif. 94088.
Copyright: © 1968 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

From the Cinema to the Cinema Theater [Active]
The Iso-Deformation of Images and the Criterion for Delimitation of the Usable Areas in Cine-Auditoriums [Active]
Lecture Hall and Learning Space Design [Active]
3. Bulletin of Instruction-Description No. 4, Polacoat, Inc., Blue Ash, Ohio, Jan. 3, 1966 . EXTERNAL
5. Terlouw Adrian L. , “Legibility standard for projected material,” from an address before the Indiana State Conference on School Planning for Audio-Visual Education, Kodak Pamphlet No S-4, 5–56KP, Sales Service Div., Eastman Kodak Co. , Rochester, N.Y. ( 1956 ). EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J05812.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

Albert L. Venning; Trapezoidal Distortion in Projected Images, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05812

Snippet:

Albert L. Venning; Trapezoidal Distortion in Projected Images, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05812

HTML (ISO 690 compliant)

Preview:

Albert L. Venning; Trapezoidal Distortion in Projected Images, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J05812

Snippet:

<span class="citation">Albert L. Venning; <cite>Trapezoidal Distortion in Projected Images</cite>, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968. Available at <a href="https://doi.org/10.5594/J05812" target="_blank" rel="noopener">https://doi.org/10.5594/J05812</a></span>

SMPTE's HTML Pub

Preview:

Albert L. Venning; Trapezoidal Distortion in Projected Images, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968
doi: 10.5594/J05812
url: https://doi.org/10.5594/J05812

Snippet:

<li>
Albert L. Venning; <cite id="bib-10-5594-j05812">Trapezoidal Distortion in Projected Images</cite>, Journal of the SMPTE ( Volume: 77, Issue: 6, June 1968); SMPTE, 1968
<span class="doi">10.5594/J05812</span>
</li>

Referenced By

Cinema Projection Distortion [Active]