JPS63101902U - - Google Patents
Info
- Publication number
- JPS63101902U JPS63101902U JP20334786U JP20334786U JPS63101902U JP S63101902 U JPS63101902 U JP S63101902U JP 20334786 U JP20334786 U JP 20334786U JP 20334786 U JP20334786 U JP 20334786U JP S63101902 U JPS63101902 U JP S63101902U
- Authority
- JP
- Japan
- Prior art keywords
- light
- fresnel lens
- condensing
- refractive surfaces
- optical axis
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
Landscapes
- Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
Description
第１図は本考案の実施例におけるフレネルレン
ズの要部断面図、第２図は従来のオーバーヘツド
プロジエクタの照明系を示す図、第３図は従来の
フレネルレンズの要部断面図である。
３，３′……フレネルレンズ、６……屈折面、
７……段部。
Fig. 1 is a sectional view of the main part of a Fresnel lens according to an embodiment of the present invention, Fig. 2 is a diagram showing the illumination system of a conventional overhead projector, and Fig. 3 is a sectional view of the main part of a conventional Fresnel lens. . 3, 3'... Fresnel lens, 6... refractive surface,
7...Danbe.
Claims (1)
た集光性のフレネルレンズであつて、互いに隣り
合う屈折面間の集光に関与しない段部に光束散乱
面を形成したことを特徴とするフレネルレンズ。 A light-condensing Fresnel lens in which annular refractive surfaces are arranged periodically from the center of the optical axis, characterized in that a light beam scattering surface is formed in a stepped portion that does not take part in condensing light between adjacent refractive surfaces. Fresnel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20334786U JPS63101902U (en) | 1986-12-24 | 1986-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20334786U JPS63101902U (en) | 1986-12-24 | 1986-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63101902U true JPS63101902U (en) | 1988-07-02 |
Family
ID=31168589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20334786U Pending JPS63101902U (en) | 1986-12-24 | 1986-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63101902U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013092717A (en) * | 2011-10-27 | 2013-05-16 | Nitto Kogaku Kk | Fresnel lens and luminaire |
| JP2017037325A (en) * | 2016-10-04 | 2017-02-16 | 日東光学株式会社 | Fresnel lens and illumination apparatus |
| JP2017040789A (en) * | 2015-08-20 | 2017-02-23 | 株式会社タムロン | Optical element, optical system, and optical device |
-
1986
- 1986-12-24 JP JP20334786U patent/JPS63101902U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013092717A (en) * | 2011-10-27 | 2013-05-16 | Nitto Kogaku Kk | Fresnel lens and luminaire |
| JP2017040789A (en) * | 2015-08-20 | 2017-02-23 | 株式会社タムロン | Optical element, optical system, and optical device |
| JP2017037325A (en) * | 2016-10-04 | 2017-02-16 | 日東光学株式会社 | Fresnel lens and illumination apparatus |