DE867452C - Process for the production of cemented birefringent filters - Google Patents
Process for the production of cemented birefringent filtersInfo
- Publication number
- DE867452C DE867452C DEZ1197D DEZ0001197D DE867452C DE 867452 C DE867452 C DE 867452C DE Z1197 D DEZ1197 D DE Z1197D DE Z0001197 D DEZ0001197 D DE Z0001197D DE 867452 C DE867452 C DE 867452C
- Authority
- DE
- Germany
- Prior art keywords
- cemented
- production
- film
- birefringent
- path difference
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 5
- 239000012780 transparent material Substances 0.000 claims 1
- 239000011888 foil Substances 0.000 description 6
- 239000007858 starting material Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
Verfahren zur Herstellung von verkitteten doppelbrechenden Filtern Doppelbrechendes Material, das sowohl für technische als auch für wissenschaftliche Zwecke henötigt wirrt, steht neuerdings in Form von künstlichen Folien zur Verfügung. Es sind doppelbrechende Folien, die aus Cellulosehydrat besteben, hekanntgeworden. Für die Herstellung von. künstlich doppelbrechenden Folien eignen sich auch andere Kunststoffe, u. a. solche, die auf der Basis von Polyamiden oder Polyvinylalkoholen aufgebaut sind. Die Ausgangsstoffe können optisch i-sotrop sein und die Doppelbrechung durch Strecken erzielt werden, oder es kann auch bereits von vornherein eine Aniso-tropie des Ausgangsstoffes vorliegen und die Streckung vorgenommen werden, um die Doppelbrechung zu erhöhen oder zu verringern, je nachdem, in welcher Richtung die Folie gestreckt wird. Die künstlich doppelbrechenden Folien. sind vielfach elastisch und gehen daher beim Aufhören der mechanischen Spannung zumindest teilweise auf ihren Ausgangszustand zurück.Process for the production of cemented birefringent filters Birefringent material useful for both technical and scientific Purposes unnecessary confused, has recently become available in the form of artificial foils. Birefringent films made from cellulose hydrate have become known. For the production of. Artificially birefringent foils are also suitable Plastics, including those based on polyamides or polyvinyl alcohols are constructed. The starting materials can be optically isotropic and the birefringence can be achieved by stretching, or anisotropy can already be achieved from the outset of the starting material are present and the stretching can be carried out to reduce the birefringence increase or decrease, depending on the direction in which the film is stretched will. The artificially birefringent foils. are often elastic and therefore go when the mechanical tension ceases, at least partially to their initial state return.
Um mies zu vermeiden, wird nach der Erfindung vorgeschlagen, bei der Herstellung von doppelbrechenden Folien bestimmten Gangunterschiedes, bei denen der Wert des Gangunterschiedes durch Dehnung erreicht wird, die doppelbrechende Folie unter Festhaltung in ihrem ges@treckten. Zustand zwischen durchsichtigen Stoffen zu verkitten. Die durchsichtigen Deckscheiben sind optisch isotrop. Besonders zweckmäßig ist es, wenn die Folie bei der Verkittung in einem Spannrahmen gehalten wird." Ferner -ist es -zweckmäßig, einen solchen Kitt zu verwenden, daß Folie und Deckscheiben nach Aufhören der mechanischen Spannung in der vorgegebenen Lage fest zueinander fixiert bleiben und die Doppelbrechung in der durch die mechanische Spannung erzielten. Größe erhalten bleibt. Man erreicht dies dadurch, daß Folie und Deckscheiben über die gesamte Fläche unter Anwendung eines praktisch unelastischen Kittes fest miteinander verkittet werden.In order to avoid lousy, it is proposed according to the invention in which Manufacture of birefringent foils with a certain path difference in which the value of the path difference is achieved by stretching, the birefringent Slide while holding on to her @ stretched. State between transparent fabrics to cement. The transparent cover plates are optically isotropic. Particularly useful it is when the foil is held in a tenter frame during cementing will." In addition, it is advisable to use such a putty as the foil and cover panes after the mechanical tension has ceased in the specified position firmly to one another remain fixed and the birefringence achieved by the mechanical tension. Size is retained. This is achieved by placing the film and cover plates over the entire surface firmly together using a practically inelastic putty be cemented.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEZ1197D DE867452C (en) | 1943-06-22 | 1943-06-22 | Process for the production of cemented birefringent filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEZ1197D DE867452C (en) | 1943-06-22 | 1943-06-22 | Process for the production of cemented birefringent filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE867452C true DE867452C (en) | 1953-02-16 |
Family
ID=7618041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEZ1197D Expired DE867452C (en) | 1943-06-22 | 1943-06-22 | Process for the production of cemented birefringent filters |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE867452C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121836B (en) * | 1953-03-04 | 1962-01-11 | Zeiss Ikon Ag | Process for the production of birefringent foils with a certain path difference |
| DE1192084B (en) * | 1959-02-28 | 1965-04-29 | Otto Stuerner Dr Ing | Arrangement to generate changeable color positions with the help of the chromatic polarization of the light |
-
1943
- 1943-06-22 DE DEZ1197D patent/DE867452C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121836B (en) * | 1953-03-04 | 1962-01-11 | Zeiss Ikon Ag | Process for the production of birefringent foils with a certain path difference |
| DE1192084B (en) * | 1959-02-28 | 1965-04-29 | Otto Stuerner Dr Ing | Arrangement to generate changeable color positions with the help of the chromatic polarization of the light |
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