Şaýmflug prinsipi

Şaýmflug prinsipi geometriki düzgün bolup ol optiki sistemanyň (fotoapparat ýaly) lens tekizligi (LT) surat tekizligine (ST) parallel däl ýagdaýynda fokus tekizliginiň (FT) ugruny kesgitleýär. Bu prinsip awstriýaly harby kapitan Teodor Şaýmflugyň adyny göterýär. Ol bu prinsipi, uçaryň üstünden ýeriň suratyny alanda perspektiwadaky ýoýulmanyň düzedilmegi üçin ulanypdyr.

Şaýmflug prinsipiniň düşündirilişi

Şekil 1. Adaty fotoapparat bilen, haçan-da jisim tekizligi surat tekizligine parallel däl bolsa, diňe kiçi bölek fokusda (dury) bolar.

Figure 2. The angles of the Scheimpflug principle, using the example of a photographic lens

Figure 4. Rotation-axis distance and angle of the PoF

Adatça, fotoapparadyň lens we surat (film ýa-da sensor) tekizlikleri paralleldir we netije-de fokus tekizligi hem parallel bolýar. Eger-de tekiz jisim (binanyň diwary ýaly) surat tekizligine parallel bolsa, fokus tekizliginiň üstüne gabat gelmegi mümkin we netije-de jisim surata dury çykar. Eger-de jisim tekizligi surat tekizligine parallel däl bolsa, on-da jisim tekizligi diňe fokus tekizligi bilen kesişen çyzygynda dury görner, Şekil 1-de görkezilişi ýaly.

Surat we lens tekizliklerinden tangens çyzygy geçirilen-de, fokus tekizliginiň geçýän çyzygynda kesişýärler, Şekil 2-de görkezilişi ýaly. Şu ýagdaýda, surat tekizligine parallel bolmadyk tekiz jisim doly fokusda (dury) bolar.

Goşmaça çykgytlar

• View Camera Geometry (PDF) by Leonard Evens. Analysis of the effect of elliptical blur spots on DoF. Accessed 6 October 2009.
• Depth of Field for the Tilted Lens (PDF) by Leonard Evens. A more practical and more accessible summary of View Camera Geometry. Accessed 6 October 2009.
• How to Focus the View Camera by Quang-Tuan Luong. Includes discussion of how to set the plane of focus. Accessed 6 October 2009.
• The Scheimpflug Principle by Harold Merklinger. Accessed 6 October 2009.
• Addendum to Focusing the View Camera (PDF) by Harold Merklinger. Accessed 6 October 2009.
• Unilateral Real-time Scheimpflug Videography to Study Accommodation Dynamics in Human Eyes Archived 2010-06-16 at the Wayback Machine (PDF) by Ram Subramanian. Accessed 6 October 2009.
• Notes on View Camera Geometry (PDF) by Robert Wheeler. Accessed 6 October 2009.
• Tilt and Shift Lenses: Tailored towards small-format tilt/shift lenses, but principles apply to any format. Accessed 6 October 2009.