GB142517A - Improvements in projection apparatus for optical form, outline, and dimension gauging appliances - Google Patents
Improvements in projection apparatus for optical form, outline, and dimension gauging appliancesInfo
- Publication number
- GB142517A GB142517A GB1332717A GB1332717A GB142517A GB 142517 A GB142517 A GB 142517A GB 1332717 A GB1332717 A GB 1332717A GB 1332717 A GB1332717 A GB 1332717A GB 142517 A GB142517 A GB 142517A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lenses
- images
- lens parts
- optical
- projection apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/10—Projectors with built-in or built-on screen
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
142,517. Wilson, R. P. Sept. 17, 1917. Optical systems; optical-projection apparatus- -In optical-projection apparatus comprising two lenses or lens parts for simultaneously projecting two images upon a screen, and constituting a gauge in which comparison is made between the images of the edges of the object to be gauged and a test object, means are provided for positioning the lenses or lens parts laterally so that their optical centres can be adjusted to a separation equal to the distance between the object to be gauged and the test object, and the images are approximated by means independent of the lenses. As shown in Fig. 1, the apparatus comprises a lamp a and condenser b for producing a parallel beam, lenses or lens parts g, and a screen o. Prisms c, rotatable by worm and sector gear d or other means, are provided for deflecting the beam upwards or downwards, and prisms h, rotatable about vertical axes by screw gear k<1> or worm and sector gear k<2>, and also rotatable, if desired, about horizontal axes, are provided for bring- ing the images into proximity. When using the apparatus the test object, and object to be gauged, or a single object c of which opposite sides are to be compared, is placed in position, and the lens parts g are separated by micrometer screws f or the like until the readings of the micrometers &c. show that the distance between the lens centres s equal to the distance between the edges to be compared. The prisms h may be replaced by mirrors, and the lens parts g<1>, g<2> may be arranged to overlap as shown in Fig. 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1332717A GB142517A (en) | 1917-09-17 | 1917-09-17 | Improvements in projection apparatus for optical form, outline, and dimension gauging appliances |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1332717A GB142517A (en) | 1917-09-17 | 1917-09-17 | Improvements in projection apparatus for optical form, outline, and dimension gauging appliances |
Publications (1)
Publication Number | Publication Date |
---|---|
GB142517A true GB142517A (en) | 1920-05-13 |
Family
ID=10020909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1332717A Expired GB142517A (en) | 1917-09-17 | 1917-09-17 | Improvements in projection apparatus for optical form, outline, and dimension gauging appliances |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB142517A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE903379C (en) * | 1940-06-29 | 1954-02-04 | Wolfram Dreyhaupt Dipl Ing | Surface testing device to determine the contact area of curved surfaces of other types than planes or outer surfaces of cylinders |
-
1917
- 1917-09-17 GB GB1332717A patent/GB142517A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE903379C (en) * | 1940-06-29 | 1954-02-04 | Wolfram Dreyhaupt Dipl Ing | Surface testing device to determine the contact area of curved surfaces of other types than planes or outer surfaces of cylinders |
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