A Rotating Lens System for Cine Projection with Continuous Film Transport

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 89, No. 3, pp. 167–173
Abstract: As a point of departure, the two main methods of film transport in projection systems — intermittent and continuous — are discussed. Their basic conditions and the functions of the shutter are described. With continuous film transport, the projected image must continuously be shifted at the same frame rate as the film and in the opposite direction to its movement in order to obtain a perfectly stable image on the screen. The principle involved is called optical motion compensation. Moving, rotating, or oscillating prisms, mirrors, and lens rings may be used as optical compensators. A brief history of such devices is given. Many of these produced a so-called roving error which arises because a reference point on the film having a fixed position within the frame may not appear absolutely stationary on the screen during all phases of motion compensation. An analytical consideration of the elements and parameters that cause roving error is undertaken. The conclusion is reached that in a motion compensator consisting of a rotating ring of object lenses, the introduction of a certain amount of image distortion — by means of appropriate lens design — may compensate for the roving error and yield a steady image, free from blur.
Publication Date: 1980-03-01
DOI: 10.5594/J01629
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J01629
Author(s): W. J. P. A. VerbeekW. J. P. A. Verbeek, is a Development Engineer with nv Optische Industrie De Oude Delft, Postbus 72, 2600 MD Delft, the Netherlands.
Copyright: © 1980 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Joachim H. , Die Kinematographische Projektion , Wilhelm Knapp Verlag , Halle , 1928 . EXTERNAL
2. Wesley E. J. , “Improvements in Motion Picture Records and Methods of Producing the Same,” U.S. patent appl. 393, 257, September 1930 . EXTERNAL
3. Shannon C. E. , “Communication in the Presence of Noise,” Proc. IRE , 37 : 10 – 21 , 1949 . EXTERNAL
4. Thun R. , Der Film in der Technik , V. D. I. Verlag , Berlin , 1925 . EXTERNAL
5. Boucher L. , “Non-intermittent Film Projector,” French patent 762, 866, September 1958 . EXTERNAL
6. Van Oosten H. , “Filmprojector,” Dutch patent appl. 7709798, September 6, 1977 . EXTERNAL
7. Verbeek W. J. P. A. , “Filmprojectiestelsel,” Dutch patent appl. 7806311, June 9, 1978 . EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J01629.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:

W. J. P. A. Verbeek; A Rotating Lens System for Cine Projection with Continuous Film Transport, SMPTE Journal ( Volume: 89, Issue: 3, March 1980); SMPTE, 1980. Available at https://doi.org/10.5594/J01629

Snippet:

W. J. P. A. Verbeek; A Rotating Lens System for Cine Projection with Continuous Film Transport, SMPTE Journal ( Volume: 89, Issue: 3, March 1980); SMPTE, 1980. Available at https://doi.org/10.5594/J01629

HTML (ISO 690 compliant)

Preview:

Snippet:

<span class="citation">W. J. P. A. Verbeek; <cite>A Rotating Lens System for Cine Projection with Continuous Film Transport</cite>, SMPTE Journal ( Volume: 89, Issue: 3, March 1980); SMPTE, 1980. Available at <a href="https://doi.org/10.5594/J01629" target="_blank" rel="noopener">https://doi.org/10.5594/J01629</a></span>

SMPTE's HTML Pub

Preview:

W. J. P. A. Verbeek; A Rotating Lens System for Cine Projection with Continuous Film Transport, SMPTE Journal ( Volume: 89, Issue: 3, March 1980); SMPTE, 1980
doi: 10.5594/J01629
url: https://doi.org/10.5594/J01629

Snippet:

<li>
W. J. P. A. Verbeek; <cite id="bib-10-5594-j01629">A Rotating Lens System for Cine Projection with Continuous Film Transport</cite>, SMPTE Journal ( Volume: 89, Issue: 3, March 1980); SMPTE, 1980
<span class="doi">10.5594/J01629</span>
</li>

Referenced By

Motion Pictures [Active]