IT1102617B - Hemispherical field sight testing instrument - has projection system with prisms and mirrors rotating about axes at right angles - Google Patents
Hemispherical field sight testing instrument - has projection system with prisms and mirrors rotating about axes at right anglesInfo
- Publication number
- IT1102617B IT1102617B IT4821778A IT4821778A IT1102617B IT 1102617 B IT1102617 B IT 1102617B IT 4821778 A IT4821778 A IT 4821778A IT 4821778 A IT4821778 A IT 4821778A IT 1102617 B IT1102617 B IT 1102617B
- Authority
- IT
- Italy
- Prior art keywords
- axes
- testing instrument
- prisms
- right angles
- projection system
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 abstract 1
- 210000001525 retina Anatomy 0.000 abstract 1
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
A sight testing instrument has a projector and a spherical surface forming part of an automatically registering zone, into the centre of which the line of sight of the patient is directed. The device is also used to obtain information from the patient regarding the receipt of signals on the retina. At the centre is a totally reflective prism (27) and a projection lens (28) which rotate about a horizontal axis. This is followed by an auxiliary prism (21) so as to follow a curved path (17), so that a beam of light passes through two axes of rotation the same distance from the projected field at all points of the hemisphere. The optical system is mounted on the side of a plate (15) onto which the beam is projected, and this plate rotates about a vertical axis.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR5723377 | 1977-02-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7848217A0 IT7848217A0 (en) | 1978-02-28 |
IT1102617B true IT1102617B (en) | 1985-10-07 |
Family
ID=10929540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT4821778A IT1102617B (en) | 1977-02-28 | 1978-02-28 | Hemispherical field sight testing instrument - has projection system with prisms and mirrors rotating about axes at right angles |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1102617B (en) |
-
1978
- 1978-02-28 IT IT4821778A patent/IT1102617B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7848217A0 (en) | 1978-02-28 |
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