JPH08106648A - Diffraction grating type information recording medium and information reproducing device using the same - Google Patents
Diffraction grating type information recording medium and information reproducing device using the sameInfo
- Publication number
- JPH08106648A JPH08106648A JP6240447A JP24044794A JPH08106648A JP H08106648 A JPH08106648 A JP H08106648A JP 6240447 A JP6240447 A JP 6240447A JP 24044794 A JP24044794 A JP 24044794A JP H08106648 A JPH08106648 A JP H08106648A
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- Prior art keywords
- information
- diffraction grating
- grating
- recording medium
- diffraction
- Prior art date
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- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、与えられた情報を格子
列の回折格子帯に空間周波数分布として書き込むと共
に、書き込まれた空間周波数分布から回折角を光学的に
読み出して情報の再生を行う回折格子型情報記録媒体及
びその情報再生装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reproduces information by writing given information as a spatial frequency distribution in a diffraction grating band of a grating array and optically reading a diffraction angle from the written spatial frequency distribution. The present invention relates to a diffraction grating type information recording medium and an information reproducing apparatus thereof.
【０００２】[0002]
【従来の技術】２次元平面上に記録された１次元情報
（例えば、バーコード）や２次元情報（例えば、カルラ
コード）を画像としてホログラフィックに記録し、画像
読み取り用センサ（例えば、ＣＣＤ）で読み込み、その
画像をデコードすることで記録された情報を取り出して
再生する技術は公知のものである。2. Description of the Related Art A one-dimensional information (for example, bar code) or two-dimensional information (for example, Carla code) recorded on a two-dimensional plane is holographically recorded as an image, and an image reading sensor (for example, CCD). A technique for reading the recorded information, extracting the recorded information by decoding the image, and reproducing the information is known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記の
公知技術の方法では、情報をデジタル化して記録するた
め、アナログ情報を取り扱う場合には多くの情報量が必
要になる。また、前記の方法でアナログ情報を記録する
に必要な情報記録密度を得ることは難しく、加えて、デ
ジタル化を行う必要があるが、これによって量子誤差が
発生し、好ましくない。更に、記録された情報を再生す
るに当ってもＤ／Ａコンバータ等を含む情報処理装置が
必要になり、回路コストが大となり、実用上でも複雑と
なる問題点がある。However, in the method of the above-mentioned known art, since information is digitized and recorded, a large amount of information is required when handling analog information. In addition, it is difficult to obtain the information recording density required to record analog information by the above method, and it is necessary to perform digitization, which causes a quantum error, which is not preferable. Further, in reproducing the recorded information, an information processing device including a D / A converter or the like is required, which increases the circuit cost and is complicated in practical use.
【０００４】本発明は、以上の問題点を解決するもの
で、与えられたアナログ情報をそのまま連続的に回折格
子帯に空間周波数分布として書き込み記録させると共
に、書き込まれた情報を光学的に回折角変化として読み
出し、情報の再生を可能にする回折格子型情報記録媒体
及びその情報再生装置を提供することを目的とする。勿
論、多値デジタル情報や二値デジタル情報を書き込み，
読み出し再生することも出来る。The present invention solves the above-mentioned problems. The given analog information is continuously written and recorded as a spatial frequency distribution in the diffraction grating band as it is, and the written information is optically diffracted at an angle of diffraction. It is an object of the present invention to provide a diffraction grating type information recording medium and an information reproducing apparatus for the same which can read information as a change and reproduce information. Of course, write multilevel digital information or binary digital information,
You can also read and play.
【０００５】[0005]
【課題を解決するための手段】本発明は、以上の目的を
達成するために、微細な格子列を一定方向に連続配置し
た回折格子帯を記録トラックとし、与えられた情報を前
記格子列の空間周波数分布として書き込み可能であり、
かつ前記空間周波数分布を前記回折格子帯に沿った回折
角変化として光学的に読み出すことにより、書き込まれ
た情報の再生を可能とする回折格子型情報記録媒体を構
成する。なお、書き込まれる情報としては、アナログ情
報の他、多値デジタル情報や二値デジタル情報も勿論同
様に処理される。また、本発明は、以上の目的を達成す
るために微細な格子列を一定方向に連続配置した回折格
子帯を記録トラックとし、与えられた情報を前記格子の
空間周波数分布として書き込んだ回折格子型情報記録媒
体の情報再生装置であって、前記回折格子型情報記録媒
体の記録トラックに設けられた回折格子帯に沿って相対
的に移動するスポットビームを照射する光源と、前記回
折格子帯の照射部位から発した回折光を遂次受光し前記
照射部位に含まれる格子列の空間周波数に応じた前記回
折光の回折角を順次検出するヘッドと、検出された回折
角に基づき記録された情報を復調するデコーダとを備え
てなる情報再生装置を構成するものである。更に、具体
的に、前記光源は、単一波長のスポットビームを照射す
る。あるいは、これに代えて前記光源は、非単一波長の
スポットビームを照射し、前記ヘッドは受光した回折光
の強度分布から回折角を検出することを特徴とするもの
である。なお、与えられる情報としては電気信号，音声
信号等任意のものに適用される。また、光源としてはレ
ーザ光のように単波長のものに限らず非単一波長のもの
も適用される。与えられた情報を回折格子帯に記録する
手段としては例えば、回折格子作成機が使用される。In order to achieve the above object, the present invention uses a diffraction grating band in which fine grating rows are continuously arranged in a certain direction as a recording track, and gives given information to the grating rows. It can be written as a spatial frequency distribution,
Further, a diffraction grating type information recording medium capable of reproducing the written information is constructed by optically reading the spatial frequency distribution as a change in diffraction angle along the diffraction grating band. As the information to be written, in addition to analog information, multilevel digital information and binary digital information are of course processed in the same manner. Further, in order to achieve the above object, the present invention uses a diffraction grating band in which fine grating rows are continuously arranged in a certain direction as a recording track and writes given information as a spatial frequency distribution of the grating. An information reproducing apparatus for an information recording medium, comprising: a light source for irradiating a spot beam relatively moving along a diffraction grating band provided on a recording track of the diffraction grating type information recording medium; and irradiation of the diffraction grating band. A head that sequentially receives the diffracted light emitted from the site and sequentially detects the diffraction angle of the diffracted light according to the spatial frequency of the grating row included in the irradiation site, and the information recorded based on the detected diffraction angle. The information reproducing apparatus comprises a decoder for demodulation. More specifically, the light source emits a spot beam having a single wavelength. Alternatively, instead of this, the light source emits a spot beam having a non-single wavelength, and the head detects the diffraction angle from the intensity distribution of the received diffracted light. The given information is applied to any information such as an electric signal and a voice signal. Further, the light source is not limited to a single-wavelength light source such as laser light, and a non-single-wavelength light source is also applied. As means for recording the given information in the diffraction grating band, for example, a diffraction grating making machine is used.
【０００６】[0006]
【作用】例えば、与えられたアナログ情報を回折角と対
応させて変換し、記録トラックとしての回折格子帯に前
記回折角に見合う空間周波数分布を微細な格子列として
連続的に記録する。以上によりアナログ情報が回折格子
帯の回折格子空間周波数分布として書き込まれる。この
情報を読み出すには、前記回折格子帯を所定の速度で移
動させながら単一波長又は非単一波長の光を光源から照
射し、その照射部位から発した回折光をヘッド側に入射
せしめて回折角を検出する。この回折角を基にして元の
アナログ情報を復調して再生することが出来る。For example, given analog information is converted corresponding to the diffraction angle, and the spatial frequency distribution corresponding to the diffraction angle is continuously recorded in the diffraction grating band as the recording track as a fine grating array. As described above, the analog information is written as the diffraction grating spatial frequency distribution of the diffraction grating band. To read this information, light with a single wavelength or a non-single wavelength is emitted from a light source while moving the diffraction grating band at a predetermined speed, and the diffracted light emitted from the illuminated portion is incident on the head side. Detect the diffraction angle. Based on this diffraction angle, the original analog information can be demodulated and reproduced.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づき説明す
る。図１は回折格子型情報記録媒体の一実施例を示す平
面図、図２は与えられたアナログ情報の一例を示す線
図、図３は図２のアナログ情報に対応する空間周波数−
格子位置線図、図４は空間周波数と回折角との関係を示
す線図、図５は多値デジタル情報の記録状態を示す模式
図、図６は二値デジタル情報の記録状態を示す模式図、
図７は本発明の情報再生装置の一実施例を示す構成図で
ある。Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing an embodiment of a diffraction grating type information recording medium, FIG. 2 is a diagram showing an example of given analog information, and FIG. 3 is a spatial frequency corresponding to the analog information of FIG.
Lattice position diagram, FIG. 4 is a diagram showing the relationship between spatial frequency and diffraction angle, FIG. 5 is a schematic diagram showing a recording state of multilevel digital information, and FIG. 6 is a schematic diagram showing a recording state of binary digital information. ,
FIG. 7 is a block diagram showing an embodiment of the information reproducing apparatus of the present invention.
【０００８】図１に示すように、回折格子型情報記録媒
体１は微細な格子列２を一定方向に沿って連続的に配置
した回折格子帯からなり、情報を記憶する記録トラック
を構成する。なお、格子列２は所定の空間周波数分布を
有している。As shown in FIG. 1, a diffraction grating type information recording medium 1 is composed of a diffraction grating band in which fine grating rows 2 are continuously arranged along a certain direction, and constitutes a recording track for storing information. The grid array 2 has a predetermined spatial frequency distribution.
【０００９】図２に示すように、ある装置から出力され
た電圧の時間的変化を表わす曲線Ａがアナログ情報とし
て与えられる。勿論、与えられるアナログ情報は任意の
ものでよい。波長λの光線を垂直に入射（入射角０°）
した場合、図４に示すように空間周波数ｆは格子ピッチ
ｐの逆数１／ｐであることから回折角と格子ピッチｐは
図示のような関係にある（格子ピッチｐ＝λ／ｓｉｎ
θ）。換言すると、格子ピッチが小さく密になるほど回
折角は大きくなる。従って空間周波数はグラフに示すよ
うに回折角と対応して求められる。以上により図２に示
した電圧−時間線図は図３に示す空間周波数ｆ−格子位
置線図に置き換えられる。この空間周波数−格子位置線
図を基にして回折格子作成機により図１に示した回折格
子型情報記録媒体１が作成される。すなわち、図３に示
す空間周波数分布に従って格子列２が記録トラックに書
き込まれ、その移動方向が格子位置に対応する。なお、
回折格子作成機としては、レーザを使用した露光装置、
電子線描画装置およびその他回折格子を作成する機能を
有する微細加工装置が使用される。以上のようにして任
意のアナログ情報を格子列２からなる回折格子帯として
記録トラックに書き込むことが出来る。As shown in FIG. 2, a curve A representing the time change of the voltage output from a device is given as analog information. Of course, the analog information provided may be arbitrary. A ray of wavelength λ is incident vertically (incident angle 0 °)
In this case, since the spatial frequency f is the reciprocal 1 / p of the grating pitch p as shown in FIG. 4, the diffraction angle and the grating pitch p have the relationship shown in the drawing (grating pitch p = λ / sin).
θ). In other words, the smaller the grating pitch and the denser, the larger the diffraction angle. Therefore, the spatial frequency is obtained in correspondence with the diffraction angle as shown in the graph. As a result, the voltage-time diagram shown in FIG. 2 is replaced with the spatial frequency f-lattice position diagram shown in FIG. Based on this spatial frequency-grating position diagram, the diffraction grating information recording medium 1 shown in FIG. 1 is created by the diffraction grating creating machine. That is, the grid row 2 is written in the recording track according to the spatial frequency distribution shown in FIG. 3, and the moving direction thereof corresponds to the grid position. In addition,
As the diffraction grating creating machine, an exposure device using a laser,
An electron beam drawing device and other fine processing devices having a function of creating a diffraction grating are used. As described above, arbitrary analog information can be written in the recording track as a diffraction grating band including the grating array 2.
【００１０】図５は多値デジタル情報を回折格子型情報
記録媒体１ａに記録したものである。多値デジタル情報
は多値の空間周波数情報ｆ1・・・ｆ5等に置き換えられ
るため、前記のアナログ情報の記録方法と同様に容易に
記録することが出来る。すなわち、前記トラックをセグ
メントに分割し、各セグメントに割り当てられた所定空
間周波数で決まる格子ピッチで格子列を形成すればよ
い。FIG. 5 shows multilevel digital information recorded on the diffraction grating type information recording medium 1a. Since the multivalued digital information is replaced with the multivalued spatial frequency information f 1 ... F 5, etc., it can be easily recorded as in the recording method of the analog information. That is, the track may be divided into segments, and a grid row may be formed at a grid pitch determined by a predetermined spatial frequency assigned to each segment.
【００１１】図６は二値（０又は１）のデジタル情報を
回折格子型情報記録媒体１ｂに記録したものである。す
なわち、記録トラックに沿って前記格子列をビットに細
分化し、二値デジタル情報をビット単位毎の空間周波数
分布の格子ピッチで格子列を形成すればよい。FIG. 6 shows binary (0 or 1) digital information recorded on the diffraction grating type information recording medium 1b. That is, the lattice array may be subdivided into bits along the recording track, and the binary digital information may be formed into a lattice array at the lattice pitch of the spatial frequency distribution for each bit unit.
【００１２】次に、図７により情報再生装置３を説明す
る。情報再生装置３は、回折格子型情報記録媒体１（１
ａ，１ｂ）を支持する支持体４と、支持体４を一定速度
で移動させる図略の移動手段と、移動する回折格子型情
報記録媒体１の記録トラックに入射光８を照射する光源
５と、回折格子型情報記録媒体１の照射部位から発した
回折光９を受けて回折角を検出するヘッド６と、前記回
折角からもとの情報を復調して再生するデコーダ７等か
ら構成される。Next, the information reproducing apparatus 3 will be described with reference to FIG. The information reproducing device 3 includes a diffraction grating type information recording medium 1 (1
a, 1b), a support 4, a moving means (not shown) for moving the support 4 at a constant speed, and a light source 5 for irradiating the recording track of the moving diffraction grating type information recording medium 1 with incident light 8. , A head 6 for detecting the diffraction angle by receiving the diffracted light 9 emitted from the irradiation portion of the diffraction grating type information recording medium 1, a decoder 7 for demodulating and reproducing the original information from the diffraction angle, and the like. .
【００１３】光源５としては単一波長のレーザ光を発す
るレーザ光源の他、非単一波長の光を発する輝線スペク
トルをもつ光源，白色光の光源，Ｘ線などの可視域外の
光源、マイクロ波等の電波等が広く適用可能である。ま
た、ヘッド６としては可視光の場合ライン状に配置され
たフォトダイオードやフォトトランジスタ，光電子倍増
管，ＣＣＤ或いはこれ等をアレイ状に配置したものが適
用される。また、前記Ｘ線の場合はＸ線カメラが使用さ
れ、マイクロ波の場合はアンテナ等が用いられる。As the light source 5, in addition to a laser light source which emits laser light of a single wavelength, a light source having a bright line spectrum which emits light of a non-single wavelength, a light source of white light, a light source outside the visible range such as X-rays, and a microwave. Radio waves, etc. are widely applicable. In the case of visible light, as the head 6, a photodiode, a phototransistor, a photomultiplier tube, a CCD arranged in a line or those in which these are arranged in an array are applied. An X-ray camera is used in the case of the X-ray, and an antenna or the like is used in the case of the microwave.
【００１４】例えば、図１に示した回折格子型情報記録
媒体１を支持体４に固定し、所定の速度で支持体４を移
動しながら光源５から入射光８を照射することにより、
順次照射部位から連続的に回折光９が発せられヘッド６
で受光される。ヘッド６は回折光９の回折角を検出し、
デコーダ７に検出信号を送る。デコーダ７は回折角の検
出信号を基にして電圧−時間線図を復調，再生させる。For example, by fixing the diffraction grating type information recording medium 1 shown in FIG. 1 to the support 4 and irradiating the incident light 8 from the light source 5 while moving the support 4 at a predetermined speed,
Diffracted light 9 is continuously emitted from the irradiation site in sequence and the head 6
Is received at. The head 6 detects the diffraction angle of the diffracted light 9,
A detection signal is sent to the decoder 7. The decoder 7 demodulates and reproduces the voltage-time diagram based on the detection signal of the diffraction angle.
【００１５】本発明に係る情報記録媒体は、例えば透明
基材に金属膜等を成膜した積層構造を有している。この
金属膜に対し回折格子作成機を用いて所望の空間周波数
分布を有する格子列を一定方向に描画し、記録トラック
を形成する。透明基材は、例えばカード形状又はディス
ク形状に加工される。カード型の記録媒体に個人識別情
報等を書き込めば光学読み取り式のＩＤカードが得られ
る。また、ディスク形状の記録媒体にスパイラル状或い
は同心円状の記録トラックを形成し、これにそってアナ
ログ・オーディオ信号や、アナログビディオ信号を書き
込めば従来のレーザディスクに変る新規なオプティカル
ディスクが得られる。The information recording medium according to the present invention has, for example, a laminated structure in which a metal film or the like is formed on a transparent base material. A grating array having a desired spatial frequency distribution is drawn on the metal film in a fixed direction by using a diffraction grating creating machine to form a recording track. The transparent substrate is processed into, for example, a card shape or a disk shape. An optical reading type ID card can be obtained by writing personal identification information or the like on a card type recording medium. If a spiral or concentric recording track is formed on a disk-shaped recording medium and an analog audio signal or an analog video signal is written along the recording track, a new optical disk which is a conventional laser disk can be obtained.
【００１６】[0016]
【発明の効果】本発明によれば、次のような顕著な効果
を奏する。 １）アナログ情報をそのまま回折格子帯に書き込むこと
が出来るため量子誤差が発生せず大量の情報を正確に記
録することが出来る。 ２）Ｄ／Ａコンバータ等の信号処理装置が不要のため回
路コストの低減が図れる。 ３）情報の書き込みと読み出しが光学的に出来るため、
実使用上での煩雑性がなくなる。 ４）多値デジタル情報や二値デジタル情報も同様に記録
することが出来、使用範囲の拡大化が図れる。According to the present invention, the following remarkable effects are obtained. 1) Since analog information can be written as it is in the diffraction grating band, a large amount of information can be accurately recorded without causing a quantum error. 2) Since no signal processing device such as a D / A converter is required, the circuit cost can be reduced. 3) Because information can be written and read optically,
There is no complexity in actual use. 4) Multivalued digital information and binary digital information can be recorded in the same manner, and the range of use can be expanded.
【図１】本発明の回折格子型情報記録媒体の一実施例の
平面図。FIG. 1 is a plan view of an embodiment of a diffraction grating type information recording medium of the present invention.
【図２】与えられたアナログ情報の一例を示す線図。FIG. 2 is a diagram showing an example of given analog information.
【図３】図２のアナログ情報と対応する空間周波数−格
子位置線図。FIG. 3 is a spatial frequency-lattice position diagram corresponding to the analog information of FIG.
【図４】回折角と空間周波数との関係を示す説明用の線
図。FIG. 4 is an explanatory diagram showing a relationship between a diffraction angle and a spatial frequency.
【図５】多値デジタル情報が記録された回折格子型情報
記録媒体の実施例を示す平面図。FIG. 5 is a plan view showing an embodiment of a diffraction grating type information recording medium on which multivalued digital information is recorded.
【図６】二値デジタル情報が記録された回折格子型情報
記録媒体の実施例を示す平面図。FIG. 6 is a plan view showing an embodiment of a diffraction grating type information recording medium in which binary digital information is recorded.
【図７】本発明の情報再生装置の一実施例を示す構成
図。FIG. 7 is a block diagram showing an embodiment of an information reproducing apparatus of the present invention.
１ 回折格子型情報記録媒体 １ａ 回折格子型情報記録媒体 １ｂ 回折格子型情報記録媒体 ２ 格子列 ３ 情報再生装置 ４ 支持体 ５ 光源 ６ ヘッド ７ デコーダ ８ 入射光 ９ 回折光 1 Diffraction Grating Type Information Recording Medium 1a Diffraction Grating Type Information Recording Medium 1b Diffraction Grating Type Information Recording Medium 2 Grating Array 3 Information Reproducing Device 4 Support 5 Light Source 6 Head 7 Decoder 8 Incident Light 9 Diffracted Light
Claims (7)
回折格子帯を記録トラックとし、与えられた情報を前記
格子列の空間周波数分布として書き込み可能であり、か
つ前記空間周波数分布を前記回折格子帯に沿った回折角
変化として光学的に読み出すことにより、書き込まれた
情報の再生を可能とする回折格子型情報記録媒体。1. A diffraction grating band in which fine grating rows are continuously arranged in a certain direction is used as a recording track, and given information can be written as a spatial frequency distribution of the grating rows, and the spatial frequency distribution is used for the diffraction. A diffraction grating type information recording medium capable of reproducing written information by optically reading as a change in diffraction angle along a grating band.
の連続的な分布として書き込んだ請求項１の回折格子型
情報記録媒体。2. The diffraction grating type information recording medium according to claim 1, wherein analog information is written as a continuous distribution of spatial frequencies of the grating array.
波数の段階的な分布として書き込んだ請求項１の回折格
子型情報記録媒体。3. The diffraction grating type information recording medium according to claim 1, wherein multi-valued digital information is written as a stepwise distribution of spatial frequencies of the grating array.
ビットに細分化し、二値デジタル情報をビット単位毎の
空間周波数分布として書き込んだ請求項１の回折格子型
情報記録媒体。4. The diffraction grating type information recording medium according to claim 1, wherein the grating array is subdivided into bits along the recording track, and binary digital information is written as a spatial frequency distribution for each bit unit.
回折格子帯を記録トラックとし、与えられた情報を前記
格子の空間周波数分布として書き込んだ回折格子型情報
記録媒体の情報再生装置であって、前記回折格子型情報
記録媒体の記録トラックに設けられた回折格子帯に沿っ
て相対的に移動するスポットビームを照射する光源と、
前記回折格子帯の照射部位から発した回折光を遂次受光
し前記照射部位に含まれる格子列の空間周波数に応じた
前記回折光の回折角を順次検出するヘッドと、検出され
た回折角に基づき記録された情報を復調するデコーダと
を備えることを特徴とする情報再生装置。5. An information reproducing apparatus for a diffraction grating type information recording medium, wherein a diffraction grating band in which fine grating rows are continuously arranged in a certain direction is used as a recording track, and given information is written as a spatial frequency distribution of the grating. A light source for irradiating a spot beam relatively moving along a diffraction grating band provided on a recording track of the diffraction grating type information recording medium,
A head that sequentially receives the diffracted light emitted from the irradiation portion of the diffraction grating band and sequentially detects the diffraction angle of the diffracted light according to the spatial frequency of the grating row included in the irradiation portion, and the detected diffraction angle. An information reproducing apparatus comprising: a decoder for demodulating recorded information based on the information reproducing apparatus.
を照射することを特徴とする請求項５の情報再生装置。6. The information reproducing apparatus according to claim 5, wherein the light source emits a spot beam having a single wavelength.
ムを照射し、前記ヘッドは受光した回折光の強度分布か
ら回折角を検出することを特徴とする請求項５の情報再
生装置。7. The information reproducing apparatus according to claim 5, wherein the light source irradiates a spot beam having a non-single wavelength, and the head detects a diffraction angle from an intensity distribution of received diffracted light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240447A JPH08106648A (en) | 1994-10-05 | 1994-10-05 | Diffraction grating type information recording medium and information reproducing device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240447A JPH08106648A (en) | 1994-10-05 | 1994-10-05 | Diffraction grating type information recording medium and information reproducing device using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08106648A true JPH08106648A (en) | 1996-04-23 |
Family
ID=17059641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6240447A Pending JPH08106648A (en) | 1994-10-05 | 1994-10-05 | Diffraction grating type information recording medium and information reproducing device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08106648A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6533183B2 (en) | 2000-05-03 | 2003-03-18 | Novo Nordisk A/S | Coding of cartridges for an injection device |
| US8994382B2 (en) | 2006-04-12 | 2015-03-31 | Novo Nordisk A/S | Absolute position determination of movably mounted member in medication delivery device |
| US9522238B2 (en) | 2005-05-10 | 2016-12-20 | Novo Nordisk A/S | Injection device comprising an optical sensor |
| US9950117B2 (en) | 2009-02-13 | 2018-04-24 | Novo Nordisk A/S | Medical device and cartridge |
-
1994
- 1994-10-05 JP JP6240447A patent/JPH08106648A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6533183B2 (en) | 2000-05-03 | 2003-03-18 | Novo Nordisk A/S | Coding of cartridges for an injection device |
| US9522238B2 (en) | 2005-05-10 | 2016-12-20 | Novo Nordisk A/S | Injection device comprising an optical sensor |
| US8994382B2 (en) | 2006-04-12 | 2015-03-31 | Novo Nordisk A/S | Absolute position determination of movably mounted member in medication delivery device |
| US9950117B2 (en) | 2009-02-13 | 2018-04-24 | Novo Nordisk A/S | Medical device and cartridge |
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