CA1093871A - Optical system for visual analysis of two assemblies by superimposing of an image onto an assembly - Google Patents
Optical system for visual analysis of two assemblies by superimposing of an image onto an assemblyInfo
- Publication number
- CA1093871A CA1093871A CA310,940A CA310940A CA1093871A CA 1093871 A CA1093871 A CA 1093871A CA 310940 A CA310940 A CA 310940A CA 1093871 A CA1093871 A CA 1093871A
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- CA
- Canada
- Prior art keywords
- article
- reflecting
- image
- optical system
- semi
- 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.)
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- Optical Elements Other Than Lenses (AREA)
Abstract
TITLE
AN OPTICAL SYSTEM FOR VISUAL ANALYSIS OF TWO
ASSEMBLIES BY SUPERIMPOSING OF AN IMAGE ONTO AN ASSEMBLY
ABSTRACT
An optical system for forming an image of a refer-ence electronic assembly board or various other articles by presenting the reference assembly onto a fully reflecting surface. The image is projected onto the first surface of a half-silvered mirror, thereby forming a twice reflected image of the reference assembly. The assembly for analysis is viewed through the half-silvered mirror, so that a viewer sees the twice reflected image of the reference assembly superimposed onto the assembly for analysis. By removing the full reflecting surface, the system easily converts to one in which a reference plastic film drawing can be used instead of the reference assembly.
AN OPTICAL SYSTEM FOR VISUAL ANALYSIS OF TWO
ASSEMBLIES BY SUPERIMPOSING OF AN IMAGE ONTO AN ASSEMBLY
ABSTRACT
An optical system for forming an image of a refer-ence electronic assembly board or various other articles by presenting the reference assembly onto a fully reflecting surface. The image is projected onto the first surface of a half-silvered mirror, thereby forming a twice reflected image of the reference assembly. The assembly for analysis is viewed through the half-silvered mirror, so that a viewer sees the twice reflected image of the reference assembly superimposed onto the assembly for analysis. By removing the full reflecting surface, the system easily converts to one in which a reference plastic film drawing can be used instead of the reference assembly.
Description
TITLE
AN OPTICAL SYSTF~ FOR VISUAL ANALYSIS OF TWO
ASSEMBLIES BY SUP:~RIMPOSING OF AN IMAGE ONTO AN ASSEMBLY
BACKGROUND OF I NVENTION
(1) Field of the Invention This invention concerns an optical system for facilitating visual comparison of a master reference article with a duplicate article, by superimposing an image o~ the master article onto the duplicate article, in order to permit alteration of the duplicate article so as to conform to the master reference article.
~0_ Description of the Prior Art Article comparison apparatuses are well known.
Typical of these commercially available article comparison apparatuses is a system in which a plastic film or other suitable inverted reference drawing is utilized. This reference drawing is suspended in such a way that an image is formed on the Eirst surface of a half-silvered mirrorO The article that is to be checked for conformity to the reEerence drawing is fixed so that it is viewed through the first surface of the half-silvered mirror. The duplicate article can be viewed through the mirror because of the mirror's semi-transparent nature. A viewer looking at the half-silvered mirror now sees superimposed an image of the reference drawing and the article to be checked. In this manner, a viewer can not only check for conformity between the image and the duplicate article, but can also make any alterations to the article which are shown by the reference drawing image.
Similar systems are disclosed in U.S. patents 3,112,35 to G~ Urias, et al; 2,765,704 to A. Mottu and 3,~81,673 to R. Freeman. However, these and other systems use drawings or slide projections of reference articles, thereby requiring an additional step of preparation of a suitable drawing or transparent slide.
Elaborate means have been devised whereby light beams comprising images of two objects to be compared have been combined into one light beam, polarized and separated for viewing by a disc analyzer~ such as was done in the Freeman patent mentioned above.
In Mottu, a workpiece is checked by projecting an image oE it and superimposing an image of a reference drawing. This reference drawing of the workpiece is made on glass or transparent paper, thereby requiring an addi-tional step ~or its preparation. Mottu's systems exhibits difficulties relating to si2e and scale resulting from the use of a drawing as a reference image. Furthermore, since Mottu is a projection system employing lenses, other optical considerations such as image enlargement and deformation are necessary.
Urias discloses the use of a photographic slide projector for suppl~ing an image of a reference article. ~ `
Photographic images for reference articles tend to be less ~ ;
precise than the actual article itself.
Therefore, it is an important objective of this invention to provide a more precise means of article com-parison. This is accomplished by the use o~ an actual sample reference article instead of a photographic image or a drawing.
It is another object of the invention to provide for the elimination of preparation of an inverted drawing of the reference article.
Furthermore, it is an important l~bject of the invention to provide an apparatus which easily converts to one in which a reference drawing can be used.
SUMMARY OF THE INVENTION
The present invention consists of a housing type enclosure suitable for affixiny and fastening to it all necessary support means and reflection means. All reflect-ing and supporting means are fully contained within the bounds of the enclosure. A full reflecting surface ~fully silvered mirror~ is affixed along opposite edges of the enclosure. A master reference article is similarly affixed at an angle with respect to the full reflecting surface.
The full reflecting surface and the maste. reference article are angularly positioned so that the angle between the master reference article and the full reflecting surface is equal to the angle between the full reflecting surface and the top surface of the enclosure. A semi-transparent~ semi-reflecting mirror is held in place by mounting brackets which are attached to either side of the enclosure. This mirror is positioned so that the surfaces are horizontal and beneath both the full reflecting surface and the master reference article. rrhe duplicate article to be analyzed is then positioned below the semi-reflecting, semi-trans-parent mirror. Standard artificially produced ambient room lighting is sufficient for an operating environment for the invention.
~a~
Light beams from the master reference article inpinge upon the full reflecting sur~ace, thereby forming an inverted image of the master reference article. This inverted image is then reflected onto the first surface of the semi-reflecting, semi-transparent mirror. The semi~
reflecting, semi~transparent mirror again reflects the master reference article image so that a viewer sees the image appearing normally. Light beams from the duplicate article inpinge upon the second side of the semi-transparent, semi-reflecting mirror. A portion of these light beams pass through the mirror so that a viewer sees the twice `
reflected image of the master reference article superimposed onto the duplicate article.
The viewer can now perform an analysis upon the master and duplicate article to determine what alterations, if any, are required to the duplicate article.
DES_RIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an optical system for visual analysis.
FIG. 2 is a cross section view taken along line AA
as shown is FIG. l.
FIG. 3 is a diagramatic view of an optical system embodying the principles of operation of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
__ FIG. l depicts Applicant's optical system. Shown is a housing type enclosure 10 including two parallel sides ll and 12, top 13, base 14, back 15, a first support 16 and a second support 17. Contained within this enclosure at the topmost portion thereof is a full-silvered, fully reflecting mirror 20. This mirror is affixed along one edge to the side 11 of the enclosure 10 by means of mounting brackets 22 and 23. Similarly, this mirror is affixed along a second edge to the opposite side 12 of the enclosure 10 by two moun-ting brackets not shown, similar to brackets 22 and 23.
A half-silvered mirror 30 is affixed to side 11 of enclosure 10 by means of mounting brackets 31 and 32 and to side 12 of enclosure 10 by like mounting brackets not shown.
Surfaces 18 and 19 of sides 11 and 12 respectively, of enclosure 10 are cut back so as to easily allow the viewer 70 to insert an article such as a printed wiring card, to be analyzed onto the second support 17. In this way, a series of duplicate printed wiring cards may be examined one after another and easily placed onto the second support 17 for analysis.
Sides 11 and 12, top 13 and back 15 of enclosure 10 control the flow of ambient room light onto the system, `
thereby allowing for the necessary light for image formation.
Referring to FIG. 2, it is shown that first support 16 which holds a master reference article (printed wiring card) stationary within the enclosure 10 and at an angle 62 with respect to the reflecting surface 26 of the full~silvered mirror 20. Angle 61 formed by the intersection of top 13 and fully silvered mirror 20 is equal to angle 62.
Half-silvered mirror 30 has two surfaces, 33 and 34. These surfaces each reflect and transmit approximately one-half of the light impinging thereon.
As seen in FIG. 2, the second support 17 holcls a duplicate article ~printed wiring card) stationary and 7~ .
at an angle 64 with respect to the half-silvered mirror 30. Furthermore, the half-silvered mirror 30 is at an angle 63 with respect to top 13 so that angle 63 is equal to angle 64. `~
Next, a master reference article 40 (printed wiring card) is placed upon the first support 16. Then a duplicate article (printed wiring card) 50 is placecl upon the second support 17.
FIG. 3 demonstrates the principles of operation of the invention. Having placed a master reference article (printed wiring card) 40 onto the first support 16, an image is formed by the full reflecting surface 26 of ull--silvered mirror 20. The image thus formed is an inverted copy oE
the reference printed wiring card 40. This inverted image is reflected by the full-silvered mirror 20 so that the image is directed onto the upper surface 33 of the half-silvered mirror 30. This image on the half-silvered mirror 30 is both reflected and passed through the mirror 30.
The reflected image as seen by the viewer 70 is thereby twice reflected and takes on its original form.
Referring now to the dupllcate printed wiring card 50 placed onto second supporting means 17, the duplicate ~:
printed wiring card 50 is seen by viewer 70 due to the semi~
reflective, semi-transparent surfaces 33 and 34 of the half-silvered mirror 30. Viewer 70 looking down upon to the upper surface 33 of half-silvered mirror 30 sees a twice reflected image of master reference article ~printed wiring card) 40 superimposed onto the duplicate printed wiring card 50.
Viewer 70 is now able to make a comparison o the two printed wiring cards 40 and 50 ancl aFfect any altera- ~.
tions which are necessary to the duplicate printed wir.ing card 50 for conformation between the two printed wi.ring cards.
In FIG. 3 it is important to note that by removing half-silvered mirror 20 and placing an inverted plastic film drawing of the master reference printed wiring card at location B0, instead of actual sample printed wiring card 40, Applicant's system easily converts into one similar to those described in the prior art.
Again, referring to FIG. 3, Applicant's invention may be affixed and mounted in a variety oE positions, however;
the angle 63 formed by the intersection of top 13 and half-silvered mirror 30 must be equal to the angle 64 formed by the intersection of second supporting means 17 and half-silvered mirror 30. In addition, the angle 61 formed between the intersection of top 13 and full-silvered mirror 20 must be equal to the angle 62 formed between the in~.rseç.~tion of Eull-silvered mirror 20 and first support means 16.
As long as these relative positions are kept, Applicantls invention will operate in accordance with the principles ~:
outlined above.
Although a preferred embodiment of -the invention has been illustrated, and that form described in detail, it will be readily apparent to those skilled in the art that various mvdifications may be made therein without de- :
parting from the spirit of the invention or from the scope of the appended cl~ims.
AN OPTICAL SYSTF~ FOR VISUAL ANALYSIS OF TWO
ASSEMBLIES BY SUP:~RIMPOSING OF AN IMAGE ONTO AN ASSEMBLY
BACKGROUND OF I NVENTION
(1) Field of the Invention This invention concerns an optical system for facilitating visual comparison of a master reference article with a duplicate article, by superimposing an image o~ the master article onto the duplicate article, in order to permit alteration of the duplicate article so as to conform to the master reference article.
~0_ Description of the Prior Art Article comparison apparatuses are well known.
Typical of these commercially available article comparison apparatuses is a system in which a plastic film or other suitable inverted reference drawing is utilized. This reference drawing is suspended in such a way that an image is formed on the Eirst surface of a half-silvered mirrorO The article that is to be checked for conformity to the reEerence drawing is fixed so that it is viewed through the first surface of the half-silvered mirror. The duplicate article can be viewed through the mirror because of the mirror's semi-transparent nature. A viewer looking at the half-silvered mirror now sees superimposed an image of the reference drawing and the article to be checked. In this manner, a viewer can not only check for conformity between the image and the duplicate article, but can also make any alterations to the article which are shown by the reference drawing image.
Similar systems are disclosed in U.S. patents 3,112,35 to G~ Urias, et al; 2,765,704 to A. Mottu and 3,~81,673 to R. Freeman. However, these and other systems use drawings or slide projections of reference articles, thereby requiring an additional step of preparation of a suitable drawing or transparent slide.
Elaborate means have been devised whereby light beams comprising images of two objects to be compared have been combined into one light beam, polarized and separated for viewing by a disc analyzer~ such as was done in the Freeman patent mentioned above.
In Mottu, a workpiece is checked by projecting an image oE it and superimposing an image of a reference drawing. This reference drawing of the workpiece is made on glass or transparent paper, thereby requiring an addi-tional step ~or its preparation. Mottu's systems exhibits difficulties relating to si2e and scale resulting from the use of a drawing as a reference image. Furthermore, since Mottu is a projection system employing lenses, other optical considerations such as image enlargement and deformation are necessary.
Urias discloses the use of a photographic slide projector for suppl~ing an image of a reference article. ~ `
Photographic images for reference articles tend to be less ~ ;
precise than the actual article itself.
Therefore, it is an important objective of this invention to provide a more precise means of article com-parison. This is accomplished by the use o~ an actual sample reference article instead of a photographic image or a drawing.
It is another object of the invention to provide for the elimination of preparation of an inverted drawing of the reference article.
Furthermore, it is an important l~bject of the invention to provide an apparatus which easily converts to one in which a reference drawing can be used.
SUMMARY OF THE INVENTION
The present invention consists of a housing type enclosure suitable for affixiny and fastening to it all necessary support means and reflection means. All reflect-ing and supporting means are fully contained within the bounds of the enclosure. A full reflecting surface ~fully silvered mirror~ is affixed along opposite edges of the enclosure. A master reference article is similarly affixed at an angle with respect to the full reflecting surface.
The full reflecting surface and the maste. reference article are angularly positioned so that the angle between the master reference article and the full reflecting surface is equal to the angle between the full reflecting surface and the top surface of the enclosure. A semi-transparent~ semi-reflecting mirror is held in place by mounting brackets which are attached to either side of the enclosure. This mirror is positioned so that the surfaces are horizontal and beneath both the full reflecting surface and the master reference article. rrhe duplicate article to be analyzed is then positioned below the semi-reflecting, semi-trans-parent mirror. Standard artificially produced ambient room lighting is sufficient for an operating environment for the invention.
~a~
Light beams from the master reference article inpinge upon the full reflecting sur~ace, thereby forming an inverted image of the master reference article. This inverted image is then reflected onto the first surface of the semi-reflecting, semi-transparent mirror. The semi~
reflecting, semi~transparent mirror again reflects the master reference article image so that a viewer sees the image appearing normally. Light beams from the duplicate article inpinge upon the second side of the semi-transparent, semi-reflecting mirror. A portion of these light beams pass through the mirror so that a viewer sees the twice `
reflected image of the master reference article superimposed onto the duplicate article.
The viewer can now perform an analysis upon the master and duplicate article to determine what alterations, if any, are required to the duplicate article.
DES_RIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an optical system for visual analysis.
FIG. 2 is a cross section view taken along line AA
as shown is FIG. l.
FIG. 3 is a diagramatic view of an optical system embodying the principles of operation of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
__ FIG. l depicts Applicant's optical system. Shown is a housing type enclosure 10 including two parallel sides ll and 12, top 13, base 14, back 15, a first support 16 and a second support 17. Contained within this enclosure at the topmost portion thereof is a full-silvered, fully reflecting mirror 20. This mirror is affixed along one edge to the side 11 of the enclosure 10 by means of mounting brackets 22 and 23. Similarly, this mirror is affixed along a second edge to the opposite side 12 of the enclosure 10 by two moun-ting brackets not shown, similar to brackets 22 and 23.
A half-silvered mirror 30 is affixed to side 11 of enclosure 10 by means of mounting brackets 31 and 32 and to side 12 of enclosure 10 by like mounting brackets not shown.
Surfaces 18 and 19 of sides 11 and 12 respectively, of enclosure 10 are cut back so as to easily allow the viewer 70 to insert an article such as a printed wiring card, to be analyzed onto the second support 17. In this way, a series of duplicate printed wiring cards may be examined one after another and easily placed onto the second support 17 for analysis.
Sides 11 and 12, top 13 and back 15 of enclosure 10 control the flow of ambient room light onto the system, `
thereby allowing for the necessary light for image formation.
Referring to FIG. 2, it is shown that first support 16 which holds a master reference article (printed wiring card) stationary within the enclosure 10 and at an angle 62 with respect to the reflecting surface 26 of the full~silvered mirror 20. Angle 61 formed by the intersection of top 13 and fully silvered mirror 20 is equal to angle 62.
Half-silvered mirror 30 has two surfaces, 33 and 34. These surfaces each reflect and transmit approximately one-half of the light impinging thereon.
As seen in FIG. 2, the second support 17 holcls a duplicate article ~printed wiring card) stationary and 7~ .
at an angle 64 with respect to the half-silvered mirror 30. Furthermore, the half-silvered mirror 30 is at an angle 63 with respect to top 13 so that angle 63 is equal to angle 64. `~
Next, a master reference article 40 (printed wiring card) is placed upon the first support 16. Then a duplicate article (printed wiring card) 50 is placecl upon the second support 17.
FIG. 3 demonstrates the principles of operation of the invention. Having placed a master reference article (printed wiring card) 40 onto the first support 16, an image is formed by the full reflecting surface 26 of ull--silvered mirror 20. The image thus formed is an inverted copy oE
the reference printed wiring card 40. This inverted image is reflected by the full-silvered mirror 20 so that the image is directed onto the upper surface 33 of the half-silvered mirror 30. This image on the half-silvered mirror 30 is both reflected and passed through the mirror 30.
The reflected image as seen by the viewer 70 is thereby twice reflected and takes on its original form.
Referring now to the dupllcate printed wiring card 50 placed onto second supporting means 17, the duplicate ~:
printed wiring card 50 is seen by viewer 70 due to the semi~
reflective, semi-transparent surfaces 33 and 34 of the half-silvered mirror 30. Viewer 70 looking down upon to the upper surface 33 of half-silvered mirror 30 sees a twice reflected image of master reference article ~printed wiring card) 40 superimposed onto the duplicate printed wiring card 50.
Viewer 70 is now able to make a comparison o the two printed wiring cards 40 and 50 ancl aFfect any altera- ~.
tions which are necessary to the duplicate printed wir.ing card 50 for conformation between the two printed wi.ring cards.
In FIG. 3 it is important to note that by removing half-silvered mirror 20 and placing an inverted plastic film drawing of the master reference printed wiring card at location B0, instead of actual sample printed wiring card 40, Applicant's system easily converts into one similar to those described in the prior art.
Again, referring to FIG. 3, Applicant's invention may be affixed and mounted in a variety oE positions, however;
the angle 63 formed by the intersection of top 13 and half-silvered mirror 30 must be equal to the angle 64 formed by the intersection of second supporting means 17 and half-silvered mirror 30. In addition, the angle 61 formed between the intersection of top 13 and full-silvered mirror 20 must be equal to the angle 62 formed between the in~.rseç.~tion of Eull-silvered mirror 20 and first support means 16.
As long as these relative positions are kept, Applicantls invention will operate in accordance with the principles ~:
outlined above.
Although a preferred embodiment of -the invention has been illustrated, and that form described in detail, it will be readily apparent to those skilled in the art that various mvdifications may be made therein without de- :
parting from the spirit of the invention or from the scope of the appended cl~ims.
Claims (7)
1. An optical system for facilitating visual comparison of a master article with a duplicate article comprising: enclosure means including first support means for positioning said master article; first reflecting means angularly positioned in relation to said master article so that an image of said master article is formed; second reflecting means comprising two surfaces, each surface is semi-reflecting and semi-transparent, positioned in relation to said first reflecting means so that said formed master article image is imposed onto said first semi-reflecting surface of said second reflecting means by said first reflect-ing means, thereby twice reflecting said master article image for viewing; second support means for positioning said duplicate article between said second semi-reflecting, semi-transparent surface of said second reflecting means and said second support means, whereby said twice reflected master article image is seen superimposed onto said duplicate article, as viewed through said first and said second semi-transparent surfaces of said second reflecting means, to permit alteration of said duplicate article to conform to said master article.
2. An optical system as claimed in claim 1 wherein:
said first support means holds said master article stationary within said enclosure at an angle with respect to said first reflecting means; said angle formed between said master article and said first reflecting means equal to the angle between said first reflecting means and said first support means.
said first support means holds said master article stationary within said enclosure at an angle with respect to said first reflecting means; said angle formed between said master article and said first reflecting means equal to the angle between said first reflecting means and said first support means.
3. An optical system as claimed in claim 1 wherein:
said first reflecting means includes a fully reflecting surface.
said first reflecting means includes a fully reflecting surface.
4. An optical system as claimed in claim 1 wherein:
said first reflecting means is fully removable.
said first reflecting means is fully removable.
5. An optical system as claimed in claim 1 wherein-said second reflecting means comprises a semi-reflecting, semi-transparent mirror within said enclosure positioned between said master article and said duplicate article, whereby the angle formed between said second reflecting means and said first support means is equal to the angle formed between said second reflecting means and said second support means.
6. An optical system as claimed in claim 1 wherein:
said second support means holds said duplicate article stationary and is positioned with respect to said second reflecting means, whereby the angle formed between said second reflecting means and said second support means is equal to the angle formed between said second reflecting means and said first support means.
said second support means holds said duplicate article stationary and is positioned with respect to said second reflecting means, whereby the angle formed between said second reflecting means and said second support means is equal to the angle formed between said second reflecting means and said first support means.
7. An optical system as claimed in claim 1 wherein:
said enclosure means controls the flow of ambient light onto the system.
said enclosure means controls the flow of ambient light onto the system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85637077A | 1977-12-01 | 1977-12-01 | |
| US856,370 | 1977-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093871A true CA1093871A (en) | 1981-01-20 |
Family
ID=25323438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA310,940A Expired CA1093871A (en) | 1977-12-01 | 1978-09-08 | Optical system for visual analysis of two assemblies by superimposing of an image onto an assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1093871A (en) |
-
1978
- 1978-09-08 CA CA310,940A patent/CA1093871A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |