JPH05110959A - Solid-state image pickup device - Google Patents

Solid-state image pickup device

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Publication number
JPH05110959A
JPH05110959A JP3266470A JP26647091A JPH05110959A JP H05110959 A JPH05110959 A JP H05110959A JP 3266470 A JP3266470 A JP 3266470A JP 26647091 A JP26647091 A JP 26647091A JP H05110959 A JPH05110959 A JP H05110959A
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Japan
Prior art keywords
solid
light
image pickup
zone plate
imaging device
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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
Application number
JP3266470A
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Japanese (ja)
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JP2895997B2 (en
Inventor
Yasushi Watanabe
恭志 渡辺
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Sharp Corp
シヤープ株式会社
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Priority to JP3266470A priority Critical patent/JP2895997B2/en
Publication of JPH05110959A publication Critical patent/JPH05110959A/en
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Publication of JP2895997B2 publication Critical patent/JP2895997B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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Abstract

PURPOSE: To reduce cost by making an image pickup system compact and light in weight by providing an image forming means at the own main body of the solid-state image pickup device.
CONSTITUTION: A housing chamber 2 is opened on the front face side of a package 1, and image sensor 3 as a solid-state imaging device is housed in the housing chamber 2. The front face of the housing chamber 2 is covered with a glass lid 4 composed of transparent glass, and a spacer 6 is provided between the glass lid 4 and the package 1. Moreover, a circular zone plate 7 is formed on the inside of the glass lid 4. The circular zone plate 7 functions as an image forming means to form the images of image pickup light having a specified wavelength made incident from a light source such as the near infrared rays of wavelength λ=780nm onto the photodetecting plane of the image sensor 3. Thus, the entire image pickup system can be made compact and light in weight, and the solid-state image pickup device to contribute for cost reduction can be obtained.
COPYRIGHT: (C)1993,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、パッケージ内に収納されたイメージセンサ等の固体撮像素子に像を結像させる結像手段をパッケージそれ自体に備えた固体撮像装置に関する。 The present invention relates to a solid-state imaging device including the imaging means for forming an image on a solid-state image sensor of an image sensor or the like which is housed in a package in the package itself.

【0002】 [0002]

【従来の技術】図4はこの種の固体撮像装置の一従来例を示す。 BACKGROUND OF THE INVENTION FIG. 4 shows a conventional example of this type of solid-state imaging device. パッケージ11の前面側には収納室12が開口され、該収納室12に固体撮像素子としてのイメージセンサ13が収納される。 On the front side of the package 11 housing chamber 12 is opened, the image sensor 13 representing a solid-state image pickup element in the housing chamber 12 is accommodated. 収納室12の前面は透明ガラスからなるガラスリッド(透明蓋)14で覆われている。 Front of the storage room 12 is covered with a glass lid (transparent cover) 14 made of transparent glass.
以上の要素により固体撮像素子本体が構成される。 The solid-state imaging device body is constituted by the above elements.

【0003】ガラスリッド14の前方には光学レンズ1 [0003] Optical in front of the glass lid 14 lenses 1
5が配設され、該光学レンズ15を介して光源からの光学像がイメージセンサ13の受光面に結像されるようになっている。 5 is arranged, an optical image from a light source through the optical lens 15 is adapted to be formed on the light receiving surface of the image sensor 13.

【0004】 [0004]

【発明が解決しようとする課題】ところで、結像手段として上記のような光学レンズ15を用いる場合は、撮像系全体が大型化、かつ重量化するという欠点がある。 [SUMMARY OF THE INVENTION Incidentally, when using the optical lens 15 as described above as an imaging means, there is a disadvantage that the entire imaging system is large, and is heavier. すなわち、一般に光学レンズ15は固体撮像素子本体に比べて重く、かつ大型であると共に、結像のための焦点距離fが大きくなるため、固体撮像素子自体を小さくしたとしても、撮像系全体の小型化および軽量化を図る上で制約があるからである。 That is, in general optical lens 15 is heavier than the solid-state imaging device body, and with a large, the focal length f for imaging increases, even if small solid-state imaging device itself, the whole of the imaging system compact This is because there is a limitation in achieving and lightweight.

【0005】本発明はこのような従来技術の欠点を解消するものであり、撮像系全体の小型化および軽量化が図れ、コストダウンに大いに寄与できる固体撮像装置を提供することを目的とする。 [0005] The present invention has been made to overcome the disadvantages of the prior art, downsizing and weight reduction of the entire imaging system, and an object thereof is to provide a solid-state imaging device can greatly contribute to cost reduction.

【0006】 [0006]

【課題を解決するための手段】本発明の固体撮像装置は、入射面側に透明蓋を有し、内部に固体撮像素子が収納されたパッケージと、該透明蓋の片面側に形成され、 The solid-state imaging device of the present invention, in order to solve the problem] has a transparent lid on the incident surface side, and a package to which the solid-state imaging device is housed therein, is formed on one side of the transparent Akirafuta,
特定の波長の光による像を該固体撮像素子の受光面上に結像するサーキュラゾーンプレートとを備えてなり、そのことにより上記目的が達成される。 It and a circular zone plate for forming an image by light of a specific wavelength on the light receiving surface of the solid imaging device, the object is achieved.

【0007】 [0007]

【作用】上記のように透明蓋にサーキュラゾーンプレートを形成すると、外界から入射する特定波長の光が該サーキュラゾーンプレートによりパッケージ内の固体撮像素子の受光面に結像される。 SUMMARY OF] to form a circular zone plate to the transparent lid as described above, light of a specific wavelength incident from the outside is formed on the light receiving surface of the solid-state image pickup device in the package by the circular zone plate. 従って、このようなサーキュラゾーンプレートを透明蓋に形成する構成によれば、 Therefore, according to the configuration of forming such a circular zone plate to the transparent lid,
パッケージ、すなわち固体撮像装置本体それ自体が固体撮像素子の受光面に光を結像させる結像手段を有することになる。 Package, namely the solid-state imaging device body itself will have a focusing means for focusing the light on the light receiving surface of the solid-state imaging device.

【0008】 [0008]

【実施例】以下に本発明の実施例を説明する。 The embodiment of the present invention PREFERRED EMBODIMENTS Hereinafter will be described.

【0009】図1および図2は本発明固体撮像装置を示す。 [0009] Figures 1 and 2 show the present invention the solid-state imaging device. パッケージ1の前面側には収納室2が開口され、該収納室2に固体撮像素子としてのイメージセンサ3が収納される。 On the front side of the package 1 storage room 2 is opened, the image sensor 3 as a solid-state imaging device in the storage chamber 2 is accommodated. 収納室2の前面は透明ガラスからなるガラスリッド4で覆われている。 Front of the housing chamber 2 is covered with a glass lid 4 made of transparent glass. ガラスリッド4とパッケージ1との間にはスペーサ6が設けられる。 The spacer 6 between the glass lid 4 and the package 1 is provided.

【0010】加えて、ガラスリッド4の内面側には、図1に示すサーキュラゾーンプレート7が形成されている。 [0010] In addition, the inner surface of the glass lid 4 is circular zone plate 7 shown in FIG. 1 is formed. 該サーキュラゾーンプレート7は、光源から入射する特定波長の撮像光、例えば波長λ=780nmの近赤外光をイメージセンサ3の受光面に結像させる結像手段として機能する。 The circular zone plate 7 functions as an imaging means for focusing imaging light of a specific wavelength, for example near infrared light having a wavelength lambda = 780 nm on the light receiving surface of the image sensor 3 which is incident from the light source. 以下にサーキュラゾーンプレート7の構成を動作と共に説明する。 It will be described together with the operation of the configuration of a circular zone plate 7 below.

【0011】サーキュラゾーンプレート7は複数の円環8を同心状に形成してなり、これらの円環8の半径ri [0011] circular zone plate 7 is made by forming a plurality of annular 8 concentrically, radius ri of the annular 8
は下記数1で示される値に設定されている。 It is set to the value indicated by the following equation 1.

【0012】 [0012]

【数1】 [Number 1]

【0013】但し、S 1は最小の円環8の半径である。 [0013] However, S 1 is the radius of the smallest circle ring 8.

【0014】これらの円環8の内、下記数2で示される関係を満たすものは黒、下記数3の関係を満たすものは透明になっている。 [0014] Of these annular 8, satisfy the relation represented by the following Expression 2 is black, what satisfies the following Equation 3 is transparent.

【0015】 [0015]

【数2】 [Number 2]

【0016】 [0016]

【数3】 [Number 3]

【0017】このような構成において、今、撮像光が波長λ〔nm〕の単色光であるとすると、サーキュラゾーンプレート7にほぼ垂直に入射した光はf=S 1 2 /λとなる焦点距離上に結像する。 [0017] In this arrangement, now, the imaging light and the wavelength lambda monochromatic light [nm], the focal length light incident substantially perpendicular to the circular zone plate 7 to be f = S 1 2 / λ It forms an image on the top. 従って、撮像光が、例えば波長λ=780nmの近赤外光であり、最小半径S 1がS 1 Thus, the imaging light is, for example, the wavelength lambda = near-infrared light of 780 nm, the minimum radius S 1 is S 1
=62.5μmであるとすると、この場合の焦点距離f = When a 62.5 .mu.m, in this case the focal length f
はf=5.0mmとなる。 It will be f = 5.0mm. なお、結像面の対角長さをd Note that the diagonal length of the image plane d
とすると、f<dの場合には結像面周辺部での光量低下が目立つため、f>dが好ましい。 When, <because noticeable reduction in light quantity at the image plane peripheral portion in the case of d, f> f d is preferred.

【0018】このような構成のサーキュラゾーンプレート7によれば、透明の円環8部分を透過した各撮像光は、図2に示すように、焦点距離f上に位置するイメージセンサ3の受光面上に集束されて結像される。 According to the circular zone plate 7 having such a configuration, each imaging light transmitted through the annular 8 parts of the transparent, as shown in FIG. 2, the light-receiving surface of the image sensor 3 located on the focal length f It is focused on is imaged. それ故、このようなサーキュラゾーンプレート7をガラスリッド4の内面側に形成する場合は、上記従来例のようにガラスリッド4の前方に光学レンズ15を設ける必要がないので、撮像系の小型化および軽量化が図れる。 Therefore, when forming such a circular zone plate 7 on the inner surface of the glass lid 4, there is no need to provide the optical lens 15 in front of the glass lid 4 as in the above prior art, miniaturization of the imaging system and weight reduction can be achieved.

【0019】サーキュラゾーンプレート7はガラスリッド4の片面側に形成すればよく、内面側の代わり外面側に形成することにしてもよい。 The circular zone plate 7 may be formed on one side of the glass cover 4 may be formed in place the outer surface side of the inner surface side. 具体的には、ICのフォトマスクと同様のプロセスで作製することができる。 Specifically, it can be prepared by the same process as the photomask of the IC.

【0020】なお、本発明固体撮像装置の光源としては、単色光ないしそれに近い光を発光するものを用いる必要がある。 [0020] As the light source of the present invention the solid-state imaging device, it is necessary to use one which emits monochromatic light or light close to it. すなわち、サーキュラゾーンプレート7は特定波長の光を結像させるので、光源として白色光を用いると、色収差が大変大きくなり、信頼性が低下するからである。 That is, since the circular zone plate 7 for focusing the light of a specific wavelength, the use of white light as a light source, the chromatic aberration is very large and the reliability decreases. 但し、可視光である必要はなく赤外光や紫外光、さらにはX線光源を用いることも可能である。 However, they need not be visible infrared light or ultraviolet light, yet it is also possible to use an X-ray source.

【0021】図3は本発明固体撮像装置をカラー撮像装置に応用する場合の実施例を示している。 [0021] Figure 3 illustrates an embodiment in which the application of the present invention the solid-state imaging device in a color image pickup device. すなわち、この場合は、光源からの白色光を3枚のダイクロイックミラーM1、M2、M3でR、G、Bの3原色成分に分離し、それぞれの波長成分λ1、λ2、λ3をサーキュラゾーンプレート7a、7b、7cを介して固体撮像素子9a、9b、9cに結像させる構成をとる。 That is, in this case, the dichroic mirror M1 white 3 pieces of light from the light source, M2, M3 was separated into R, G, and three primary color component of B, and the wavelength components .lambda.1, .lambda.2, circular zone plate 7a to λ3 take 7b, the solid-state imaging device 9a through 7c, 9b, the structure to be imaged on 9c.

【0022】ここで、それぞれのサーキュラゾーンプレート7a、7b、7cは対応する波長成分の光を固体撮像素子9a、9b、9cの受光面に精度よく結像できるように円環の半径が設定されている。 [0022] Here, each of the circular zone plate 7a, 7b, 7c the corresponding wavelength component light to the solid-state imaging device 9a, 9b, the radius of the circular ring so that it can be accurately formed on the light receiving surface of 9c is set ing.

【0023】このようなカラー撮像装置に応用する場合も、大型、かつ大重量の光学レンズが不要になるので、 [0023] Also when applied to such a color imaging apparatus, large, and since a large weight of the optical lens is not necessary,
撮像系全体の装置構成を小型化および軽量化できる利点がある。 It can be advantageously miniaturized and weight of the entire apparatus configuration imaging system.

【0024】 [0024]

【発明の効果】以上の本発明固体撮像装置によれば、固体撮像装置本体それ自体が結像手段を有するので、大型、かつ重量の光学系が必要であった従来の撮像系に比べて、撮像系を格段に小型化、かつ軽量化できる。 According to the above the present invention the solid-state imaging device according to the present invention, since the solid-state image pickup device body itself having the imaging means, large, and as compared with conventional imaging optics was necessary in weight, remarkably miniaturized imaging system, and can be lightweight. 従って、撮像装置のコストダウンに大いに寄与できる。 Thus, it contributes greatly to the cost of the imaging apparatus.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明固体撮像装置の平面図。 Figure 1 is a plan view of the present invention the solid-state imaging device.

【図2】図に示す固体撮像装置の側面図。 Figure 2 is a side view of the solid-state imaging device shown in FIG.

【図3】本発明固体撮像装置を応用したカラー撮像装置の概略構成図。 [3] The present invention Solid schematic diagram of a color image pickup apparatus which applies an imaging device.

【図4】固体撮像装置の一従来例を示す図面。 [4] illustrates an example of a conventional solid-state imaging device.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 パッケージ 3 イメージセンサ 4 ガラスリッジ 7 サーキュラゾーンプレート 8 円環 1 package 3 image sensor 4 glass ridge 7 circular zone plate 8 yen ring

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】入射面側に透明蓋を有し、内部に固体撮像素子が収納されたパッケージと、 該透明蓋の片面側に形成され、特定の波長の光による像を該固体撮像素子の受光面上に結像するサーキュラゾーンプレートとを備えた固体撮像装置。 [Claim 1 further comprising a transparent cover on the incident surface side, and a package to which the solid-state imaging device is housed therein, is formed on one side of the transparent Akirafuta, the image formed by light of a particular wavelength of the solid-state image capturing device the solid-state imaging device that includes a circular zone plate that forms an image on the light receiving surface.
JP3266470A 1991-10-15 1991-10-15 The solid-state imaging device Expired - Fee Related JP2895997B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3266470A JP2895997B2 (en) 1991-10-15 1991-10-15 The solid-state imaging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3266470A JP2895997B2 (en) 1991-10-15 1991-10-15 The solid-state imaging device

Publications (2)

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JPH05110959A true JPH05110959A (en) 1993-04-30
JP2895997B2 JP2895997B2 (en) 1999-05-31

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5763943A (en) * 1996-01-29 1998-06-09 International Business Machines Corporation Electronic modules with integral sensor arrays
US8378300B2 (en) 2009-01-22 2013-02-19 Sumitomo Electric Industries, Ltd. Near-infrared imaging sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360080A (en) * 1989-07-27 1991-03-15 Sharp Corp Photodetector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360080A (en) * 1989-07-27 1991-03-15 Sharp Corp Photodetector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5763943A (en) * 1996-01-29 1998-06-09 International Business Machines Corporation Electronic modules with integral sensor arrays
US5869896A (en) * 1996-01-29 1999-02-09 International Business Machines Corporation Packaged electronic module and integral sensor array
US5907178A (en) * 1996-01-29 1999-05-25 International Business Machines Corporation Multi-view imaging apparatus
US8378300B2 (en) 2009-01-22 2013-02-19 Sumitomo Electric Industries, Ltd. Near-infrared imaging sensor

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