| 单词 | iris diaphragm |
| 例句 | Ground glass and colored plates may be inserted above the iris diaphragm. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z It is fitted with iris diaphragm and supplied with the Nos. Kodaks and Kodak Supplies 1914 The shutter leaves are formed of segments opening in star shape, giving even illumination over the entire plate the instant the exposure is started, and it has an iris diaphragm. Premo Cameras 1914 Rack the condenser down slightly and cut down the aperture of the iris diaphragm so that the light, although even, is dim. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Tycho Brahe invented, and applied to the pointers of his instruments, an aperture-sight of variable area, like the iris diaphragm used now in photography. History of Astronomy The condenser and iris diaphragm form one piece, giving central but no oblique illumination. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The shutter leaves are formed of segments opening in star shape, giving even illumination over the entire plate the instant the exposure is started, and an iris diaphragm is supplied for stopping down. Kodaks and Kodak Supplies 1914 The apparatus includes the following parts: Cylinder iris diaphragm. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The lower iris diaphragm is for use in connection with the condenser only. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z Ground or colored glass discs may be inserted above the iris diaphragm if modification of the light is desired. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z A ring under the iris diaphragm serves to hold a ground glass or colored disc. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z They are also fitted with indicator for registering each exposure as made and iris diaphragm. Kodaks and Kodak Supplies 1914 A round glassplate is set in the stage, below which is an iris diaphragm to properly regulate the illumination. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z In the lower power objectives the angular aperture is to be reduced by the iris diaphragm. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The whole sub-stage may be raised or lowered in the optical axis by means of a rack and pinion, and a similar arrangement permits lateral illumination by moving the iris diaphragm in the horizontal plane. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z A ring under the iris diaphragm serves to hold a ground glass or colored disc. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The small illuminating apparatus consists of a somewhat smaller condenser with iris diaphragm and can be adjusted to the Stand IV, when it has the cylinder diaphragm. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The regulation of the cylinder iris diaphragm is accomplished by means of a lever. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z The cylinder iris diaphragm comes into play when the condenser is swung out of position. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z A ring below the iris diaphragm permits the insertion of glass discs for the purpose of modifying the light. Microscopes and Accessory Apparatus Catalogue No. 40 2011-04-14T02:00:42.743Z |
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