JPH0164110U - - Google Patents
Info
- Publication number
- JPH0164110U JPH0164110U JP1987158112U JP15811287U JPH0164110U JP H0164110 U JPH0164110 U JP H0164110U JP 1987158112 U JP1987158112 U JP 1987158112U JP 15811287 U JP15811287 U JP 15811287U JP H0164110 U JPH0164110 U JP H0164110U
- Authority
- JP
- Japan
- Prior art keywords
- lens holder
- objective lens
- recording medium
- fixed
- pickup device
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 210000003644 lens cell Anatomy 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案による光ピツクアツプ装置の一
実施例を示す概略構成図、第２図は同実施例にお
ける対物レンズ部部分の断面図、第３図は本考案
による光ピツクアツプ装置の一実施例を示す断面
図、第４図は一般的な光ピツクアツプ装置の光学
系を示す概略構成図、第５図は従来の光ピツクア
ツプ装置を説明するための部分断面図である。
１６…対物レンズ部、２４…レンズホルダ（対
物レンズホルダ）、２５…対物レンズ（対物レン
ズセル）、２９…λ／４波長板。
FIG. 1 is a schematic configuration diagram showing an embodiment of an optical pickup device according to the present invention, FIG. 2 is a sectional view of an objective lens portion in the same embodiment, and FIG. 3 is an embodiment of an optical pickup device according to the present invention. 4 is a schematic configuration diagram showing the optical system of a general optical pickup device, and FIG. 5 is a partial sectional view for explaining a conventional optical pickup device. 16... Objective lens section, 24... Lens holder (objective lens holder), 25... Objective lens (objective lens cell), 29... λ/4 wavelength plate.
Claims (1)
端側に固定される対物レンズとを備えた対物レン
ズ部を介して記録媒体に光ビームを照射して、こ
の記録媒体上に情報を記録したり、記録されてい
る情報を読み取つたりする光ピツクアツプ装置に
おいて、前記レンズホルダの筒部内にλ／４波長
板を固定したことを特徴とする光ピツクアツプ装
置。 Recording information on the recording medium by irradiating a light beam onto the recording medium through an objective lens unit that includes a cylindrical lens holder and an objective lens fixed to one end of the lens holder; An optical pickup device for reading recorded information, characterized in that a λ/4 wavelength plate is fixed within the cylindrical portion of the lens holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987158112U JPH079209Y2 (en) | 1987-10-15 | 1987-10-15 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987158112U JPH079209Y2 (en) | 1987-10-15 | 1987-10-15 | Optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0164110U true JPH0164110U (en) | 1989-04-25 |
| JPH079209Y2 JPH079209Y2 (en) | 1995-03-06 |
Family
ID=31438146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987158112U Expired - Lifetime JPH079209Y2 (en) | 1987-10-15 | 1987-10-15 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079209Y2 (en) |
-
1987
- 1987-10-15 JP JP1987158112U patent/JPH079209Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079209Y2 (en) | 1995-03-06 |
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