GB1256217A - Improvements relating to photo-conductive devices - Google Patents
Improvements relating to photo-conductive devicesInfo
- Publication number
- GB1256217A GB1256217A GB24964/70A GB2496470A GB1256217A GB 1256217 A GB1256217 A GB 1256217A GB 24964/70 A GB24964/70 A GB 24964/70A GB 2496470 A GB2496470 A GB 2496470A GB 1256217 A GB1256217 A GB 1256217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pbo
- sno
- layer
- mixed crystals
- photoconductive
- 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
- 239000013078 crystal Substances 0.000 abstract 6
- 238000001704 evaporation Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 229910006404 SnO 2 Inorganic materials 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000010849 ion bombardment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/39—Charge-storage screens
- H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/233—Manufacture of photoelectric screens or charge-storage screens
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Light Receiving Elements (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
1,256,217. Photoconductors; image pick-up tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 22 May, 1970 [27 May, 1969], No. 24964/70. Headings H1D and H1K. A photoconductive material comprises PbO containing mixed crystals of PbO and SnO. The addition of SnO to PbO decreases the energy gap and hence shifts the absorption edge to longer wavelengths thus improving the red sensitivity. As shown, Fig. 1, the target of a vidicon camera tube comprises a photoconductive layer 15 deposited on a transparent electrode 13 of SnO 2 . The layer 15 may be of uniform composition or may comprise a layer containing mixed crystals of PbO and SnO formed on electrode 13 covered with a layer of tetragonal PbO on which the electron beam impinges. The mixed crystal layer may be formed by evaporating powdery mixed crystals or a mixture of powdery PbO and powdery SnO from a single crucible or by simultaneous evaporation of PbO and SnO from separate crucibles. Methods of preparing the mixed crystals are described. The deposited photoconductive layer is exposed to oxygen ion bombardment by means of a discharge in an O 2 atmosphere to incorporate excess O 2 into the surface of the target to form a barrier for electrons absorbed by the surface from the scanning beam in use. A photoconductive cell may be produced by applying indigitated electrodes to a photoconductive layer containing mixed crystals of PbO and SnO.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6908066A NL6908066A (en) | 1969-05-27 | 1969-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1256217A true GB1256217A (en) | 1971-12-08 |
Family
ID=19807025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24964/70A Expired GB1256217A (en) | 1969-05-27 | 1970-05-22 | Improvements relating to photo-conductive devices |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3610987A (en) |
| JP (1) | JPS482035B1 (en) |
| CA (1) | CA934145A (en) |
| DE (1) | DE2024581C3 (en) |
| FR (1) | FR2043693A1 (en) |
| GB (1) | GB1256217A (en) |
| NL (1) | NL6908066A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233265A (en) * | 1986-07-04 | 1993-08-03 | Hitachi, Ltd. | Photoconductive imaging apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL290119A (en) * | 1963-03-12 |
-
1969
- 1969-05-27 NL NL6908066A patent/NL6908066A/xx unknown
-
1970
- 1970-05-01 US US33548A patent/US3610987A/en not_active Expired - Lifetime
- 1970-05-13 CA CA082625A patent/CA934145A/en not_active Expired
- 1970-05-20 DE DE2024581A patent/DE2024581C3/en not_active Expired
- 1970-05-22 GB GB24964/70A patent/GB1256217A/en not_active Expired
- 1970-05-23 JP JP4374670A patent/JPS482035B1/ja active Pending
- 1970-05-26 FR FR7019117A patent/FR2043693A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US3610987A (en) | 1971-10-05 |
| JPS482035B1 (en) | 1973-01-22 |
| DE2024581B2 (en) | 1979-11-22 |
| DE2024581A1 (en) | 1970-12-03 |
| CA934145A (en) | 1973-09-25 |
| NL6908066A (en) | 1970-12-01 |
| FR2043693A1 (en) | 1971-02-19 |
| DE2024581C3 (en) | 1980-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |