32:) P. The caption is translated as: "Fig. 20. Concerning depth with photographic lenses. The upper and lower parts of the figure are identical in the position of the field plane, entrance pupil and the object. The only difference is the diameter of the entrance pupil, the upper being twice the size of the lower. For this reason the upper circles of confusion o1 o2 are also twice the size of the lower ones at the field plane O and the object side image o1 O o2 is twice as blurry as the lower. (By accident the print in the upper field plane O says O1 instead of o1.)"
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120:(see his 1904 and 1906 books). He says, "At this point it will be sufficient to note that all these formulae involve quantities relating exclusively to the entrance-pupil and its position with respect to the object-point, whereas the focal length of the transforming system does not enter into them."
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Von Rohr's method of DOF calculation involves projecting object points to circles of confusion in the field plane (Einstellebene), with reference to the entrance pupil (
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Illustration of von Rohr's method for constructing front and near DOF limits from the outside-the-box parameters, aperture diameter
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Photographs of von Rohr and more information about him are available on the Zeiss website and the
AntiqueSpectacles site.
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A street in Jena is named after him: Moritz-von-Rohr-Straße, near Carl-Zeiss-Promenade and Otto-Schott-Straße.
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In 1936 he published a retrospective, "The First Jena
Catalogue of Optical Glasses Published in 1886", in
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Von Rohr wrote several books on optics, optical instruments, and photographic lenses, in German.
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The 1899 book was reprinted: Sources of Modern
Photography series, New York: Arno Press, 1979.
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Prof. Dr. Moritz von Rohr, "The First Jena
Catalogue of Optical Glasses Published in 1886",
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for eyeglasses. He invented the eyeglass lens designs that became the Zeiss
Punktal lenses.
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Die
Bilderzeugung in optischen Instrumenten vom Standpunkte der geometrischen Optik
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Geometrical
Investigation of the Formation of Images in Optical Instruments
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refers to Von Rohr’s "interpretation" of depth of field in his 1899 book
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39:(4 April 1868 – 20 June 1940) was an optical scientist at
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Von Rohr is usually credited with the design of the first
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Theorie und
Geschichte Des Photographischen Objecktivs
81:and known as Łążyn, near Inowrocław. He obtained a
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112:location and diameter, without reference to
203:The 1904 book was translated into English:
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104:He also developed a method of computing
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162:Forschungen zur Geschichte der Optik,
175:, Berlin: Verlag von Julius Springer
281:Honor Roll of Distinguished Persons
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246:A History of the Photographic Lens
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269:Welcome to Carl Zeiss AG, Germany
211:, London: H. M. Stationery Office
158:Focal Encyclopedia of Photography
301:Supplement to "Current Science"
217:Supplement to "Current Science"
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337:People from the German Empire
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283:at www.antiquespectacles.com
62:Moritz von Rohr was born in
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194:Die binokularen Instrumente
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244:Rudolf Kingslake (1989).
187:Die optischen Instrumente
332:People from Toruń County
189:, Leipzig: B. G. Teubner
83:doctorate of philosophy
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196:, Berlin: J. Springer
182:, Berlin: J. Springer
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327:Scientists from Jena
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87:University of Berlin
75:Grand Duchy of Posen
141:circle of confusion
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156:According to the
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322:1940 deaths
317:1868 births
223:Photographs
185:1906, 1911
311:Categories
231:References
93:Inventions
68:Hohensalza
41:Carl Zeiss
89:in 1892.
118:f-number
72:Prussian
20:von Rohr
164:1943."
85:at the
49:Germany
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79:Poland
64:Lonzyn
207:1920
192:1920
171:1899
66:near
250:ISBN
116:and
58:Life
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