JPH0360080A - Photodetector - Google Patents
PhotodetectorInfo
- Publication number
- JPH0360080A JPH0360080A JP1196337A JP19633789A JPH0360080A JP H0360080 A JPH0360080 A JP H0360080A JP 1196337 A JP1196337 A JP 1196337A JP 19633789 A JP19633789 A JP 19633789A JP H0360080 A JPH0360080 A JP H0360080A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- photodetector
- light
- light receiving
- condensing
- 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
- 238000010586 diagram Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Transforming Light Signals Into Electric Signals (AREA)
- Color Television Image Signal Generators (AREA)
- Light Receiving Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、受光装置に関し、特に入射光を電気信号に変
換する受光素子の光学系に係る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a light receiving device, and particularly to an optical system of a light receiving element that converts incident light into an electrical signal.
〈従来技術〉
従来の受光装置として、カメラ一体型ＶＴＲに用いられ
、ホワイトバランスを調整するオートホワイトバランス
モジュールを例に挙げ説明する。<Prior Art> As a conventional light receiving device, an auto white balance module used in a camera-integrated VTR and for adjusting white balance will be described as an example.
第８図はオートホワイトバランスモジュールの構造を示
した断面図である。FIG. 8 is a sectional view showing the structure of the auto white balance module.
オートホワイトバランスモジュールにおいて、拡散板ｉ
を通過した光は、赤外カットフィルター２を通り赤外線
領域の光は遮断され可視光成分のみが受光素子３に入射
する。In the auto white balance module, the diffuser plate i
The light that has passed through passes through an infrared cut filter 2, where light in the infrared region is blocked and only visible light components enter the light receiving element 3.
なお、図中、４は装置本体、５は集光レンズ、６はプリ
ント基板、７は電子部品である。In addition, in the figure, 4 is an apparatus main body, 5 is a condensing lens, 6 is a printed circuit board, and 7 is an electronic component.
〈 発明が解決しようとする課題 〉
近年、オートホワイトバランスモジュールは、ＶＴＲ一
体型カメラの小型化、電子スチールカメラの小型化に伴
い、薄型、小型化の要求が一層強くなってきている。し
かし、第８図に示す従来のオートホワイトバランスモジ
ュールにおいて、集光レンズ５は拡散板ｌを通過した光
を受光素子３に集光する機能を有しているが、集光レン
ズ５に両面凸レンズを使用しているので装置自体の厚み
がどうしても厚くなる。<Problems to be Solved by the Invention> In recent years, there has been an increasing demand for auto white balance modules to be thinner and smaller as VTR-integrated cameras and electronic still cameras become smaller. However, in the conventional auto white balance module shown in FIG. , the thickness of the device itself inevitably increases.
また、オートホワイトバランスモジュールは、ＶＴＲカ
メラに用いられることから、撮像素子で映す画面の光源
を判別することも必要となる。したがって、オートホワ
イトバランスモジュールには撮像素子の視野角より広い
視野角が要求される。Furthermore, since the auto white balance module is used in a VTR camera, it is also necessary to determine the light source of the screen displayed by the image sensor. Therefore, the auto white balance module is required to have a viewing angle wider than the viewing angle of the image sensor.
そこで、本発明は、上記に鑑み、薄型でかつ広指向角を
持つ受光装置の提供を目的とする。Therefore, in view of the above, an object of the present invention is to provide a light receiving device that is thin and has a wide directivity angle.
〈 課題を解決するための手段 〉
本発明による課題解決手段は、第１図ないし第７図の如
く、装置本体ｌＯに、受光素子１１と、該受光素子１１
の前方に配され入射光を受光素子１１に集光する集光レ
ンズ１２とを備え、該集光レンズ１２としてフレネルレ
ンズが使用されたものである。<Means for Solving the Problems> As shown in FIGS. 1 to 7, the means for solving the problems according to the present invention includes a light-receiving element 11 and a light-receiving element 11 in the device main body lO.
A condensing lens 12 is provided in front of the light receiving element 11 to condense incident light onto a light receiving element 11, and a Fresnel lens is used as the condensing lens 12.
く作用〉
上記課題解決手段において、入射光が本体ＩＯに入射す
ると、入射光は、集光レンズ１２により集光され受光素
子ＩＩに入射する。Effect> In the above problem solving means, when the incident light enters the main body IO, the incident light is focused by the condensing lens 12 and enters the light receiving element II.
このとき、集光レンズ１２にフレネルレンズを使用して
いるので、広い指向性を得るために集光レンズ１２の厚
みを厚くする必要がなくなり、装置自体を薄型化がでる
。At this time, since a Fresnel lens is used as the condenser lens 12, there is no need to increase the thickness of the condenser lens 12 in order to obtain wide directivity, and the device itself can be made thinner.
また、フレネルレンズは複数の凸部を有しているので、
凸レンズに比べて同一の厚さでは広指向性を得ることが
できる。Also, since Fresnel lenses have multiple convex parts,
Compared to a convex lens, a wider directivity can be obtained with the same thickness.
〈実施例〉
以下、本発明の第一実施例を第１図に基づいて説明する
。<Example> Hereinafter, a first example of the present invention will be described based on FIG. 1.
第１図は本発明第一実施例の受光装置の断面図である。FIG. 1 is a sectional view of a light receiving device according to a first embodiment of the present invention.
本実施例の受光装置は、カメラ一体型ＶＴＲにおいて、
ホワイトバランスを調整するオートホワイトバランスモ
ジュールとして使用されている。The light receiving device of this embodiment is used in a camera-integrated VTR.
It is used as an auto white balance module to adjust white balance.
すなわち、第１図の如く、本実施例のオートホワイトバ
ランスモジュールは、装置本体１０に、受光素子Ｉｔと
、該受光素子１１の前方に配され入射光を受光素子１１
に集光する集光レンズ１２とを備え、該集光レンズ１２
としてフレネルレンズが使用されたものである。That is, as shown in FIG. 1, the auto white balance module of this embodiment includes a light receiving element It and a light receiving element It disposed in front of the light receiving element 11 in the apparatus main body 10, and directs incident light to the light receiving element 11.
a condenser lens 12 that condenses light into the condenser lens 12;
A Fresnel lens was used.
前記本体ｌＯは、外乱光の入射を防止するため遮光性樹
脂により断面矩形に形成されている。該本体ＩＯは、そ
の上部に入射光の侵入を許す入射口１３と、該入射口１
３の下部に連通し受光素子１１が収納される収納室１４
とが設けられている。The main body 10 is made of light-shielding resin and has a rectangular cross section to prevent the incidence of disturbance light. The main body IO has an entrance port 13 at its upper part that allows incident light to enter, and the entrance port 1.
A storage chamber 14 communicating with the lower part of 3 and storing the light receiving element 11
and is provided.
前記入射口Ｉ３は、入射光を拡散する拡散板！５により
覆われて入る。そして、入射口１３内には、拡散板１５
により拡散された入射光のうち赤外線領域の光を遮断す
る赤外線カットフィルタ１６と、集光レンズＩ２とが配
されている。The input port I3 is a diffuser plate that diffuses the incident light! Enter covered by 5. A diffuser plate 15 is provided in the entrance port 13.
An infrared cut filter 16 that blocks light in the infrared region among the incident light diffused by the infrared rays and a condensing lens I2 are arranged.
前記拡散板１５は、断面コ字形されており、入射口１３
の外壁の一部に突出形成された突起１７に係合保持され
ている。The diffuser plate 15 has a U-shaped cross section, and has an entrance port 13.
It is engaged and held by a protrusion 17 formed protrudingly from a part of the outer wall of.
前記受光素子１１は、ｐｎ接合され互いに分光感度の異
なる複数のフォトダイオードチップ１８が内蔵されてい
る。該フォトダイオードチップ１８は、リード端子１９
に搭載されており、該リード端子１９はプリント基板２
０に接続されている。The light receiving element 11 includes a plurality of photodiode chips 18 which are connected to a pn junction and have mutually different spectral sensitivities. The photodiode chip 18 has a lead terminal 19
The lead terminal 19 is mounted on the printed circuit board 2.
Connected to 0.
そして、該受光素子１１は、プリント基板２０とともに
前記収納室１４に収納されている。The light receiving element 11 is housed in the storage chamber 14 together with the printed circuit board 20.
前記集光レンズ１２は、片面に複数の凸部１２ａを有す
る片面フレネルレンズが使用されている。The condenser lens 12 is a single-sided Fresnel lens having a plurality of convex portions 12a on one side.
該集光レンズ１２は、受光素子１１と、赤外線カットフ
ィルタ１６との間に配されており、その両端は入射口１
３と収納室１４との連通部に形成された支持体２１によ
り保持されている。The condensing lens 12 is arranged between the light receiving element 11 and the infrared cut filter 16, and both ends thereof are connected to the entrance port 1.
3 and the storage chamber 14 is held by a support 21 formed at a communicating portion between the storage chamber 14 and the storage chamber 14 .
なお、図中、２２は電子部品である。In addition, in the figure, 22 is an electronic component.
上記構成において、入射光が拡散板１５に入射すると、
拡散板１５により拡散される。この拡散された入射光は
、赤外線カットフィルタ１６を通り、赤外線領域の光は
遮断される。これにより、可視光成分のみが集光レンズ
１２により集光され受光素子１１に入射する。In the above configuration, when the incident light enters the diffuser plate 15,
The light is diffused by the diffusion plate 15. This diffused incident light passes through an infrared cut filter 16, and light in the infrared region is blocked. As a result, only the visible light component is focused by the condenser lens 12 and enters the light receiving element 11 .
このとき、集光レンズ１２にフレネルレンズを使用して
いるので、広い指向性を得るために集光レンズ１２の厚
みを厚くする必要がなくなり、装置自体を薄型化がでる
。At this time, since a Fresnel lens is used as the condenser lens 12, there is no need to increase the thickness of the condenser lens 12 in order to obtain wide directivity, and the device itself can be made thinner.
また、フレネルレンズは複数の凸部１２ａを有している
ので、凸レンズに比べて同一の厚さでは広指向性を得る
ことができる。Moreover, since the Fresnel lens has a plurality of convex portions 12a, it can obtain wider directivity than a convex lens with the same thickness.
次に、本発明に係る受光装置をリモートコントロール装
置の一構成部品として利用した第二実施例を第２．３図
に基づいて説明する。Next, a second embodiment in which the light receiving device according to the present invention is used as a component of a remote control device will be described with reference to FIG. 2.3.
第２図は本発明第二実施例の受光装置を示す図、第３図
は同じくその回路ブロック図である。FIG. 2 is a diagram showing a light receiving device according to a second embodiment of the present invention, and FIG. 3 is a circuit block diagram thereof.
本実施例は、本発明をリモートコントロール装置に利用
したもので、第２図の如く、受光素子ｉ１の前方に集光
レンズ１２としてフレネルレンズを配したものである。In this embodiment, the present invention is applied to a remote control device, and as shown in FIG. 2, a Fresnel lens is arranged as a condensing lens 12 in front of the light receiving element i1.
前記受光素子ＩＩは、プリント基板２０に接続されてお
り、該プリント基板２０にはＩＣ等の電子部品２２が搭
載されている。The light receiving element II is connected to a printed circuit board 20, and an electronic component 22 such as an IC is mounted on the printed circuit board 20.
そして、該受光素子１１は、第３図に示す増幅回路に接
続されている。この増幅回路は、受光素子ｌｌにより変
換された電気信号を増幅する増幅器２３と、該増幅器２
３で増幅された信号の周波数を選択するリミッタ２４お
よびバンドパスフィルタ２５と、該リミッタ２４および
バンドパスフィルタ２５により選択された周波数を検波
する復調器２６と、該復調器２６で検波された周波数を
波形成形する積分器２７および比較器２８とから構成さ
れている。The light receiving element 11 is connected to an amplifier circuit shown in FIG. This amplifier circuit includes an amplifier 23 that amplifies the electrical signal converted by the light receiving element ll, and the amplifier 2
a limiter 24 and a band-pass filter 25 that select the frequency of the signal amplified in step 3; a demodulator 26 that detects the frequency selected by the limiter 24 and band-pass filter 25; and a frequency detected by the demodulator 26. It is composed of an integrator 27 and a comparator 28 that shape the waveform.
前記集光レンズ１２は、上記第一実施例と異なり両面フ
レネルレンズが使用されている。The condenser lens 12 uses a double-sided Fresnel lens, unlike the first embodiment.
上記構成において、受光素子ｌｌは、集光レンズ１２で
集光された光信号を受光すると、電気信号に変換する。In the above configuration, when the light receiving element 11 receives the optical signal focused by the condensing lens 12, it converts it into an electrical signal.
そして、第３図の如く、増幅器２３で電気信号を増幅し
、リミッタ２４およびバンドパスフィルタ２５により周
波数を選択し、復調器２６で検波し、積分器２７および
比較器２８で波形整形して出力信号を出力する。Then, as shown in FIG. 3, the electric signal is amplified by the amplifier 23, the frequency is selected by the limiter 24 and the bandpass filter 25, the wave is detected by the demodulator 26, the waveform is shaped by the integrator 27 and the comparator 28, and the signal is output. Output a signal.
このとき、集光レンズ１２としてフレネルレンズを使用
しているので、光信号の到達距離が長くなり、かつ同一
の厚さでは広指向性を得ることができる。At this time, since a Fresnel lens is used as the condensing lens 12, the reach distance of the optical signal becomes long, and wide directivity can be obtained with the same thickness.
したがって、いろいろな角度から光信号を受光すること
ができる。Therefore, optical signals can be received from various angles.
その他の効果は第一実施例と同様である。Other effects are similar to those of the first embodiment.
また、上記第二実施例の変形例として、第４図に示すよ
うに、受光素子１１の前方に集光レンズ１２としてのフ
レネルレンズを一体成形してもよい。Further, as a modification of the second embodiment, as shown in FIG. 4, a Fresnel lens as the condensing lens 12 may be integrally molded in front of the light receiving element 11.
この場合、受光素子１４と集光レンズ１２の光軸合せの
必要がなくなる。In this case, there is no need to align the optical axes of the light receiving element 14 and the condensing lens 12.
なお、本発明は、上記実施例に限定されるものではなく
、本発明の範囲内で上記実施例に多くの修正および変更
を加え得ることは勿論である。It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.
例えば、上記第一実施例において、第５図に示す如く片
面フレネルレンズの内面を凹面状に設けてもよい。これ
により、より広い指向性を得ることができる。For example, in the first embodiment described above, the inner surface of the single-sided Fresnel lens may be provided in a concave shape as shown in FIG. Thereby, wider directivity can be obtained.
また、第一実施例において、第６図に示すような両面フ
レネルレンズを使用してもよく、さらに第一、第二実施
例において、第７図の如く、フレネルレンズを組み合わ
せて用いてもよい。Further, in the first embodiment, a double-sided Fresnel lens as shown in FIG. 6 may be used, and in the first and second embodiments, a combination of Fresnel lenses as shown in FIG. 7 may be used. .
〈発明の効果〉
以上の説明から明らかな通り、本発明によると、装置本
体に、入射光を受光素子に集光する集光レンズを備え、
集光レンズとしてフレネルレンズを使用しているので、
広い指向性を得るために集光レンズの厚みを厚くする必
要かなくなり、装置自体を薄型化がでる。′
また、フレネルレンズは複数の凸部を有しているので、
凸レンズに比べて同一の厚さでは広指向性を得ることが
できる。<Effects of the Invention> As is clear from the above description, according to the present invention, the device main body is provided with a condensing lens that condenses incident light onto a light receiving element,
Since a Fresnel lens is used as a condensing lens,
There is no need to increase the thickness of the condensing lens in order to obtain wide directivity, and the device itself can be made thinner. ′ Also, since the Fresnel lens has multiple convex parts,
Compared to a convex lens, a wider directivity can be obtained with the same thickness.
第１図は本発明第一実施例の受光装置の断面図、第２図
は本発明第二実施例の受光装置を示す図、第３図は同じ
くその回路ブロック図、第４図は本発明第二実施例の変
形例を示す図、第５図ないし第７図は他の実施例の集光
レンズの形状を示す図、第８図は従来の受光装置の断面
図である。
ＩＯ＝装置本体、１１：受光素子、１２：集光レンズ。
出
代
願
理
人
人
シャープ株式会社
中村恒久FIG. 1 is a sectional view of a light receiving device according to a first embodiment of the present invention, FIG. 2 is a diagram showing a light receiving device according to a second embodiment of the present invention, FIG. 3 is a circuit block diagram thereof, and FIG. 4 is a diagram showing a light receiving device according to a second embodiment of the present invention. FIGS. 5 to 7 are diagrams showing a modification of the second embodiment, FIGS. 5 to 7 are diagrams showing the shape of a condensing lens in other embodiments, and FIG. 8 is a sectional view of a conventional light receiving device. IO=device main body, 11: light receiving element, 12: condensing lens. Attorney-at-Law Sharp Co., Ltd. Tsunehisa Nakamura
Claims (1)
射光を受光素子に集光する集光レンズとを備え、該集光
レンズとしてフレネルレンズが使用されたことを特徴と
する受光装置。A light-receiving device characterized in that the device main body includes a light-receiving element and a condensing lens arranged in front of the light-receiving element to condense incident light onto the light-receiving element, and a Fresnel lens is used as the condensing lens. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196337A JPH0360080A (en) | 1989-07-27 | 1989-07-27 | Photodetector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196337A JPH0360080A (en) | 1989-07-27 | 1989-07-27 | Photodetector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0360080A true JPH0360080A (en) | 1991-03-15 |
Family
ID=16356154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196337A Pending JPH0360080A (en) | 1989-07-27 | 1989-07-27 | Photodetector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0360080A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05110959A (en) * | 1991-10-15 | 1993-04-30 | Sharp Corp | Solid-state image pickup device |
| JPH11313236A (en) * | 1998-04-27 | 1999-11-09 | Sekonic Co Ltd | Image pickup element assembly for image pickup device |
| US6242274B1 (en) * | 1995-11-29 | 2001-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of mounting a chip on a flexible foil substrate for positioning on a capsule |
| JP2001305976A (en) * | 2000-04-25 | 2001-11-02 | Kyocera Corp | Photodetecting assembly used also as display, and portable terminal |
| JP2006228877A (en) * | 2005-02-16 | 2006-08-31 | Sharp Corp | Light receiving device and optical transmitter/receiver module using the same |
| JP2007234970A (en) * | 2006-03-02 | 2007-09-13 | Sharp Corp | Light receiving apparatus, light receiving and emitting apparatus provided with the light receiving apparatus, optical space transmission device provided with the light receiving apparatus or the light receiving and emitting apparatus, and electronic apparatus provided with the light receiving apparatus or the light receiving and emitting apparatus or the optical space transmission device |
| JP2008078450A (en) * | 2006-09-22 | 2008-04-03 | Rohm Co Ltd | Light-receiving module |
| US7733580B2 (en) | 2006-11-06 | 2010-06-08 | Panasonic Corporation | Light emitting module and light receiving module |
| JP2011517057A (en) * | 2008-01-30 | 2011-05-26 | ヒューレット−パッカード デベロップメント カンパニー エル．ピー． | Optical interconnection |
| JP2011244413A (en) * | 2010-05-13 | 2011-12-01 | Sekonix Co Ltd | Ir receiver, and liquid crystal shutter 3d glasses having the same |
-
1989
- 1989-07-27 JP JP1196337A patent/JPH0360080A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05110959A (en) * | 1991-10-15 | 1993-04-30 | Sharp Corp | Solid-state image pickup device |
| US6242274B1 (en) * | 1995-11-29 | 2001-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of mounting a chip on a flexible foil substrate for positioning on a capsule |
| JPH11313236A (en) * | 1998-04-27 | 1999-11-09 | Sekonic Co Ltd | Image pickup element assembly for image pickup device |
| JP2001305976A (en) * | 2000-04-25 | 2001-11-02 | Kyocera Corp | Photodetecting assembly used also as display, and portable terminal |
| JP2006228877A (en) * | 2005-02-16 | 2006-08-31 | Sharp Corp | Light receiving device and optical transmitter/receiver module using the same |
| JP2007234970A (en) * | 2006-03-02 | 2007-09-13 | Sharp Corp | Light receiving apparatus, light receiving and emitting apparatus provided with the light receiving apparatus, optical space transmission device provided with the light receiving apparatus or the light receiving and emitting apparatus, and electronic apparatus provided with the light receiving apparatus or the light receiving and emitting apparatus or the optical space transmission device |
| JP2008078450A (en) * | 2006-09-22 | 2008-04-03 | Rohm Co Ltd | Light-receiving module |
| US7733580B2 (en) | 2006-11-06 | 2010-06-08 | Panasonic Corporation | Light emitting module and light receiving module |
| JP2011517057A (en) * | 2008-01-30 | 2011-05-26 | ヒューレット−パッカード デベロップメント カンパニー エル．ピー． | Optical interconnection |
| US9869836B2 (en) | 2008-01-30 | 2018-01-16 | Hewlett Packard Enterprise Development Lp | Optical interconnects |
| JP2011244413A (en) * | 2010-05-13 | 2011-12-01 | Sekonix Co Ltd | Ir receiver, and liquid crystal shutter 3d glasses having the same |
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