Details of exhibit
- Exhibition:
- 1902 Forty-seventh Annual Exhibition of the Royal Photographic Society of Great Britain
- Exhibit title:
- Fourteen Stereoscopic Photomicrographs of Diatoms, made with an oil immersion objective in fulfilment of two objects
- Exhibitor:
- Frederic Eugene Ives
- Section:
- Stereoscopic and Lantern Transparencies and Prints
- Exhibit No.:
- 443
- Description:
- (1) To study the relation of the diffraction image to the dioptric image, and (2) to see if this procedure may not be made helpful in the study of minute structures and possibly lead to the settlement of some vexed questions.
The method of procedure is believed to be new, in that the difference between the two images is brought about solely by decentering the diaphragm at the back of the substage condenser, so that there can be no suppression of diffraction pencils at the back of the objective. So far as the exhibitor is aware is has always hitherto been the practice to cover half of the back of the objective. The amplifications vary from x 300 to above x 2,000. In the examination and study of some of the results it is necessary to take into consideration the roundness of the field of the objective which makes the plane of sharp definition vary where there is no alteration of object distance. (An achromatic hand stereoscope is provided for the examination of this exhibit). - Exhibit type:
- Photograph
- Process:
- [Not Listed] ()
- Award:
- none
