JPS6029996B2 - Information reading method - Google Patents
Information reading methodInfo
- Publication number
- JPS6029996B2 JPS6029996B2 JP52099582A JP9958277A JPS6029996B2 JP S6029996 B2 JPS6029996 B2 JP S6029996B2 JP 52099582 A JP52099582 A JP 52099582A JP 9958277 A JP9958277 A JP 9958277A JP S6029996 B2 JPS6029996 B2 JP S6029996B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- information
- ions
- reading
- neodymium
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 14
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 40
- 229910052779 Neodymium Inorganic materials 0.000 claims description 39
- -1 neodymium ions Chemical class 0.000 claims description 38
- 230000005284 excitation Effects 0.000 claims description 20
- 230000035945 sensitivity Effects 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 235000008753 Papaver somniferum Nutrition 0.000 description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 19
- 229910052710 silicon Inorganic materials 0.000 description 19
- 239000010703 silicon Substances 0.000 description 19
- 240000001090 Papaver somniferum Species 0.000 description 17
- 230000003287 optical effect Effects 0.000 description 17
- 239000000203 mixture Substances 0.000 description 9
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 241000218180 Papaveraceae Species 0.000 description 4
- 230000003321 amplification Effects 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 238000004020 luminiscence type Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 244000241257 Cucumis melo Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 241000519695 Ilex integra Species 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- XWVQUJDBOICHGH-UHFFFAOYSA-N dioctyl nonanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCC(=O)OCCCCCCCC XWVQUJDBOICHGH-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Landscapes
- Character Input (AREA)
Description
【発明の詳細な説明】
本発明は、光学的に文字、数字、文様、符号等の情報を
読み取る方式、およびこれに用いるに有利な記録用紙に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for optically reading information such as characters, numbers, patterns, codes, etc., and a recording paper advantageous for use therein.
文字、数字、文様、符号等の情報を光学的に読み取る方
式の一つとして、上記の情報をけし、光を発するインク
で記録し、適当な励起光照射により発するけし、光を観
測することにより情報を読み取る方式がある。One of the methods of optically reading information such as letters, numbers, patterns, codes, etc. is to record the above information with ink that emits light, and to observe the light that is emitted by irradiation with appropriate excitation light. There is a method to read information.
これらけし、光体を用いた従来の方式においては、例え
ば、特顔昭５１一５４４１４号（特開昭５２−１３８１
９ｙ号）に記載した如くネオジムイオンで付活されたけ
し、光体を情報記録用として用い、けし・光の検知器と
してはシリンコンで作られた受光素子を用いていた。し
かしながら、上述した従釆の方式においては、ネオジム
イオンの主たる発光と、受光器の感度スペクトルとの適
合がそれ程良くなく、更に主たる発光の効率も高くない
ために、記録された情報を読み取る際の受光器出力が充
分ではなかった。In the conventional method using these poppies and light bodies, for example,
As described in No. 9y), a poppy and a light body activated with neodymium ions were used for recording information, and a light-receiving element made of silicon was used as a poppy and light detector. However, in the conventional method described above, the match between the main emission of neodymium ions and the sensitivity spectrum of the photodetector is not very good, and the efficiency of the main emission is also not high, so it is difficult to read recorded information. The receiver output was not sufficient.
したがって、たとえば、誤読特に用紙の汚染等による光
出力の低下により、記録された情報を誤まって読み取る
という欠点があった。本発明は、上に述べた従来方式に
よる欠点をなくし、記録された情報を誤りなく読み取る
方式を提供することを目的とする。Therefore, there is a drawback that, for example, recorded information may be read incorrectly due to a reduction in optical output due to misreading, particularly due to contamination of the paper. An object of the present invention is to eliminate the drawbacks of the conventional methods described above and to provide a method for reading recorded information without error.
上記の目的を達成するために、本発明者達は、情報記録
用けし、光体と、情報読み取り用光検出器との適合性を
種々検討した。In order to achieve the above object, the present inventors conducted various studies on the compatibility of an information recording poppy, a light body, and an information reading photodetector.
この結果、適合性が高く、情報光の出力として従来方式
より高出力が得られ、したがって、記録された用紙の汚
染による誤動作の少ない方式として、ネオジムとイッテ
ルビウムイオンとで賦活された情報記録用けし、光体と
シリコン光検出器とを用いた高性能の情報論み取り方式
を得ることができた。たとえば、シリコンを使った光検
出器は、近赤外波長領域における情報読み取り装置用の
固体光検出器として、感度、安定性等全ての点で優れて
いる。As a result, the information recording poppy activated with neodymium and ytterbium ions is highly compatible and provides a higher output of information light than the conventional method, and is therefore less likely to malfunction due to contamination of the recorded paper. We were able to obtain a high-performance information processing method using a light body and a silicon photodetector. For example, a photodetector using silicon is excellent in all respects such as sensitivity and stability as a solid-state photodetector for information reading devices in the near-infrared wavelength region.
例えば、シリコンフオトダィオードの分光感度特性の一
例を第１図に示した。一般に８００一９０瓜ｍ程度に最
高感度を持つ。一方、従釆、情報読み取り用として利用
されてきたネオジム付活けし・光体の主たる発光の波長
は約１．０５山ｍにあり、この波長におけるシリコンフ
オトダィオードの感度は、最高感度の１２％程度以下で
あった。第２図に、本発明に用いられる記録用けし、光
体の一例けし、光スペクトルを示した。第２図ａはＮふ
．６ＹｂＭＰ５〇．４ ， ｛ｂ）は Ｎｄ。‐８Ｙｂ
〇．２Ｎａ２Ｍｇ２（Ｖ０４）３の例である。けし、光
の主波長は約０．９８ムｍにあり、その波長におけるシ
リコン受光器の感度は、最高感度の約３７％である。し
たがって、記録用けし、光体のけし、光スペクトルと、
シリコン光検出器の感度スペクトルとの適合性は、従来
方法と比較して約３倍に向上した。For example, an example of the spectral sensitivity characteristics of a silicon photodiode is shown in FIG. Generally, the maximum sensitivity is around 800-90 meters. On the other hand, the main wavelength of light emitted from neodymium-loaded light bodies that have been used for reading information is approximately 1.05 m, and the sensitivity of silicon photodiodes at this wavelength is the highest sensitivity. It was about 12% or less. FIG. 2 shows an example of a recording poppy and a light body used in the present invention, and its optical spectrum. Figure 2 a is Nf. 6YbMP5〇. 4, {b) is Nd. -8Yb
〇． This is an example of 2Na2Mg2(V04)3. However, the dominant wavelength of light is about 0.98 mm, and the sensitivity of the silicon photodetector at that wavelength is about 37% of the maximum sensitivity. Therefore, the recording poppy, the optical poppy, the optical spectrum,
Compatibility with the sensitivity spectrum of a silicon photodetector was improved approximately three times compared to the conventional method.
０．９８仏ｍのけし、光は、励起されたネオジムイオン
からエネルギーを伝達されたイッテルビウムイオンの発
光である。The 0.98 french poppy light is the emission of ytterbium ions that have energy transferred from excited neodymium ions.
このためその発光波長は、イッテルビウムイオンを含め
た希土類イオンの一般的特性として、どのような組成の
けし、光体においてもほとんど変化しない。第２図に例
示した通りである。すなわち、イッテルビウムとネオジ
ムとで賭活されたけし、光体の主たる発光とシリコン受
光器との適合性は、従来のネオジム賦活けし、光体から
の主たる発光とシリコン受光器との適合性に比較して、
大幅に向上することが理解される。本発明においては、
けし、光体としてネオジム・イオンとイッテルビウム・
イオンで賦活されていることが肝要であり、上述の如く
結晶母体に本質的には依らない。この二つのイオンによ
って本発明が蓮せられる理由について詳述する。ネオジ
ムイオン（Ｎｄ３十）は、８０皿ｍ付近にＮｄ３１の４
１９／２→４Ｆ５／２の還移に対応した強い吸収を持ち
、情報読み取りの際の励起光の吸収に適している。Therefore, as a general characteristic of rare earth ions including ytterbium ions, the emission wavelength hardly changes regardless of the composition of the light source. This is as illustrated in FIG. In other words, the compatibility between ytterbium and neodymium, the main light emission from the light body, and the silicon receiver is better than the compatibility between the main light emission from the light body and the silicon receiver when using conventional neodymium. hand,
It is understood that this is a significant improvement. In the present invention,
Poppies, neodymium ions and ytterbium ions as light bodies.
It is important that it is activated by ions, and as mentioned above, it does not essentially depend on the crystal matrix. The reason why the present invention is enabled by these two ions will be explained in detail. Neodymium ion (Nd30) has 4 of Nd31 near 80 plate m.
It has strong absorption corresponding to the reduction of 19/2→4F5/2, and is suitable for absorbing excitation light when reading information.
ネオジムに吸収されたエネルギーは、高い効率でイッテ
ルビウムイオンに伝達される。The energy absorbed by neodymium is transferred to ytterbium ions with high efficiency.
更に励起状態にあるイッテルビウムイオンはほゞ１００
％の効率で９８仇ｍ付近の発光を生ずることとなる。た
とえば、本発明情報の読み取り方式に用いるけし、光体
、Ｎｄｏ．８Ｙ丸．２ＮもＭ＆（Ｖ０４）３の発光スペ
クトルは第２図ｂに示す如きものである。この場合、け
し、光体の励起には、８０仇伽にピークをもったＧａＡ
Ｉ瓜発光ダイオードを用い、Ｓ−１型の光電面をもった
光電子倍管で発光の測定を行なった。９４伽伽より短波
長の発光は、主として、励起光源であるＧａＮＡｓ発光
ダイオードの発光であり、９８仇ｍ付近の発光は、励起
されたネオジムイオンからエネルギー伝達を受けたイッ
テルビウムイオンの発光、１，０５瓜ｍ付近の小さな発
光はネオジムイオンの発光である。Furthermore, the number of ytterbium ions in the excited state is approximately 100
% efficiency, light emission at around 98 m is produced. For example, poppies, light bodies, Ndo. 8Y circle. The emission spectrum of 2N and M&(V04)3 is as shown in FIG. 2b. In this case, for excitation of the light body, GaA with a peak at 80° is used.
Luminescence was measured using an I-melon light emitting diode and a photomultiplier tube with an S-1 type photocathode. The light emission with a wavelength shorter than 94km is mainly the light emission of the GaNAs light emitting diode that is the excitation light source, and the light emission around 98m is the light emission of ytterbium ions that have received energy transfer from the excited neodymium ions. The small luminescence near 05 m is the luminescence of neodymium ions.
従来のネオジム賦活けし、光体の発光は主として１，０
５仇血付近の発光と９０仇伽付近の発光とであり両者と
もにネオジムイオンの４Ｆ３／２励起準泣からの発光で
ある。この励起準位からの発光の効率は、通常のネオジ
ム賦活けし、光体では１００％に近く、そのうち約６０
％が１，０５仇ｍの発光である。９０瓜ｍ付近の発光は
、第１図からも明らかな如く、励起光源である。Conventional neodymium activation, the luminescence of the light body is mainly 1,0
The light emission near 5.5 and the light emission near 90. both are light emission from 4F3/2 excited quasi-excitation of neodymium ions. The efficiency of light emission from this excited level is close to 100% in a normal neodymium activated light body, of which about 60%
% is light emission of 1.05 m. As is clear from FIG. 1, the light emitted at around 90 m is an excitation light source.
ＧａＮＡｓ発光ダイオードの発光と重なりが大きい。し
たがって、印字されたけし・光体からげし・光を情報と
して読み取る際には、適当な光フィルターを用いて、励
起光との重なりの少ない１．０５皿ｍ付近の発光のみを
検出して読み取っていた。本発明になる情報読み取り方
式では、ネオジムイオンの４Ｆ３／２励起準位からイッ
テルビウムイオンへのエネルギー伝達の効率は、最適の
条件で９０％じ久上となり、一方励起されたイッテルビ
ウムイオンの発光の効率は約１００％であることがわか
った。その結果ネオジムイオンの４Ｆ３′２励起準位か
ら約６０％の効率で発光していた１，０５仇ｍの発光を
、約９０％以上の効率で発光するイッテルビウムイオン
の発光に変換したことにより、高出力を与えることが可
能となる。発明者等は、種々実験を重ねた結果、次の如
きネオジム・イオンおよびイッテルビウム・イオンを賦
活せしむる材料を本発明の情報読み取り方式および記録
用紙にけい光体として用いることが出来ることを見し、
出した。There is a large overlap with the light emission of the GaNAs light emitting diode. Therefore, when reading a printed poppy, a light source, or light as information, use an appropriate optical filter to detect and read only the emitted light at around 1.05 m, which has little overlap with the excitation light. was. In the information reading method of the present invention, the efficiency of energy transfer from the 4F3/2 excited level of neodymium ions to ytterbium ions is nearly 90% under optimal conditions, while the efficiency of light emission of excited ytterbium ions was found to be approximately 100%. As a result, the 1,05 m emission from the 4F3'2 excited level of neodymium ions, which was emitted with an efficiency of about 60%, was converted into the emitted light of ytterbium ions, which emitted with an efficiency of about 90% or more. It becomes possible to provide high output. As a result of various experiments, the inventors found that the following materials that activate neodymium ions and ytterbium ions can be used as phosphors in the information reading system and recording paper of the present invention. death,
I put it out.
本発明に用いる記録用けし、光体としては、Ｃａ，。The recording poppy and light body used in the present invention are Ca.
（Ｐ０４）６Ｆ２：Ｎｄ，Ｙｂ：Ｃａ８凶２（Ｐ０４）
６０２：Ｎｄ，Ｙｂ：ＹＡＩ０３：Ｎｄ，Ｙｂ：Ｙ３Ａ
Ｉ５０，２：Ｎｄ，Ｙｂ：等がある。これらドープ型の
けし、光体の場合、ＮｄおよびＹｂは１〜１０％程度の
賦活のものを用いている。更に、ごく最近Ｎｄを用いた
超小型固体レーザ材料として注目されている組成物、お
よびこれら組成物の類似組成物である材料、（Ｎｄ，Ｙ
ｂ）Ｐ３０９：（Ｎｄ，Ｙｂ）Ｐ５０，４：Ｌｉ（Ｎｏ
，Ｙｂ）Ｐ４０，２：Ｎａ（Ｎｄ，Ｙｂ）Ｐ４０，２：
Ｋ（Ｎｄ，Ｙｂ）Ｐ４０．２：Ｋ３（Ｎｄ，Ｙｂ）Ｐ２
０８：Ｎａ（Ｎｄ，Ｙｂ）（Ｗ０４）２：Ｎａ５（Ｎｄ
，Ｙｂ）（Ｗ０４）４：Ｎａ（Ｎｄ，Ｙｂ）（Ｍｏ０４
）２：Ｎも（Ｎｄ，Ｙｂ）（Ｍｏ０４）４：Ｎａ２（Ｎ
ｄ，Ｙｂ）Ｍｇ２（Ｖ０４）３：ＡＩ３（Ｎｄ，Ｙｂ）
（Ｂ０３）４：（ＡＩ，Ｃｒ）３（Ｎｄ，Ｙｂ）（Ｂ○
３）４：Ｎ雀（Ｎｄ，Ｙｂ）（Ｓｉ０３）４：Ｎａ３（
Ｎｄ，Ｙｂ）Ｓｉ２０７：Ｎａ３（Ｎｄ，Ｙｂ）Ｇｅ２
０７：Ｎも（Ｎｄ，Ｙｂ）（戊０３）４：（Ｎｄ，Ｙｂ
）ＭｇＮ，．○，９および、上記組成の（Ｎｄ，Ｙｂ）
イオンの一部を３価を取り得るイオンでかつ、８０瓜ｍ
から１００Ｍｍの波長にわたって吸収のないイオン、即
ちイットリウム（Ｙ）、スカンジウム（Ｓｃ）、ランタ
ン（仏）、セリウム（Ｃｅ）、力ドリニウム（Ｇｄ）、
ルテシウム（Ｌｕ）、ガリウム（Ｇａ）、インジウム（
ｌｎ）、アンチモン（Ｓｂ）、ビスマス（Ｂｉ）から選
ばれた少なくとも一種のイオンにより置換された材料を
けし、光体として用いることができる。(P04) 6F2: Nd, Yb: Ca8 evil 2 (P04)
602:Nd, Yb:YAI03:Nd,Yb:Y3A
I50,2:Nd, Yb: etc. In the case of these doped type poppies and light bodies, activated Nd and Yb of about 1 to 10% are used. Furthermore, compositions that have recently attracted attention as ultra-small solid-state laser materials using Nd, and materials similar to these compositions (Nd, Y
b) P309:(Nd,Yb)P50,4:Li(No
, Yb) P40,2: Na(Nd, Yb) P40,2:
K(Nd,Yb)P40.2:K3(Nd,Yb)P2
08:Na(Nd,Yb)(W04)2:Na5(Nd
,Yb)(W04)4:Na(Nd,Yb)(Mo04
)2:N also (Nd, Yb) (Mo04)4:Na2(N
d, Yb) Mg2(V04)3:AI3(Nd, Yb)
(B03) 4: (AI, Cr) 3 (Nd, Yb) (B○
3) 4:Njaku (Nd, Yb) (Si03) 4:Na3(
Nd,Yb)Si207:Na3(Nd,Yb)Ge2
07: N also (Nd, Yb) (戊03) 4: (Nd, Yb
) MgN,. ○, 9 and (Nd, Yb) of the above composition
Some of the ions can be trivalent, and 80 melon
Ions that have no absorption over a wavelength of 100 Mm from
Lutetium (Lu), Gallium (Ga), Indium (
A material substituted with at least one kind of ion selected from the group consisting of antimony (Sb), antimony (Sb), and bismuth (Bi) can be used as a light body.
ＮｄおよびＹｂは約５％以上のものを用いている。本方
式を採用した情報読み取り装置の概念図を第３図および
第４図に示した。Nd and Yb are used in an amount of about 5% or more. Conceptual diagrams of an information reading device employing this method are shown in FIGS. 3 and 4.
第３図および第４図の装置において、基本的な構成要素
、すなわち励起光源３、光ガイド４、受光器特にシリコ
ン受光器６、および増幅、判別回路部７は同一である。
なお増幅、判別回路部ものものは従来技術で十分である
。In the devices of FIGS. 3 and 4, the basic components are the same, namely the excitation light source 3, the light guide 4, the light receiver, in particular the silicon light receiver 6, and the amplification and discrimination circuitry 7.
It should be noted that conventional technology is sufficient for the amplification and discrimination circuit sections.
第３図の装置は、記録用紙を静止又は低速度で移動させ
ながら情報を読み取る場合に適している。The apparatus shown in FIG. 3 is suitable for reading information while the recording paper is stationary or moving at low speed.
光ガイド４には、用紙に反射した励起光と記録されたけ
し、光体からの発光とがとり込まれるために、光フィル
ター５を設けて、けし、光のみをシリコン受光器６に導
入する必要がある。第４図の装置は、記録用紙を高速度
で移動させながら情報を読み取る場合に適している。In order to capture the excitation light reflected on the paper, the recorded light, and the light emitted from the light body, it is necessary to install an optical filter 5 on the light guide 4 to introduce only the light from the light into the silicon receiver 6. There is. The apparatus shown in FIG. 4 is suitable for reading information while moving recording paper at high speed.
用紙に反射された励起光は、スリット８にさえぎられて
光ガイド４にはとり入れられない。記録用に用いたけし
・光体の主たる発光すなわちイッテルビウムイオンの発
光は、１０‐ろ沙程度の速さで減衰するから、励起光照
射が断たれた後１０‐３秒程度以内に、記録されたけし
、光情報が、スリット８を通過すれば、光ガイド４を通
して受光器６にけし、光が到達して検知される。なお第
４図の装置においても、第３図の装置と同様に励起をさ
えぎり、けし、光を透過させる光フィルターを用いるこ
とが可能である。さらにまた、赤外光に対して透明な記
録用紙に記録されたけし、光情報を読み取る場合には、
第３図および第４図のごとく、励起光源と、けし、光信
号検出部とを記録用紙に対して同じ方向に設置してもよ
く、又、記録用紙をはさんで設置してもよいことは自明
である。The excitation light reflected by the paper is blocked by the slit 8 and is not introduced into the light guide 4. The main light emission of the poppy and light body used for recording, that is, the light emission of ytterbium ions, decays at a rate of about 10-fila, so the recorded light will be ready within about 10-3 seconds after the excitation light irradiation is cut off. When the optical information passes through the slit 8, it passes through the light guide 4 to the light receiver 6, where the light reaches and is detected. Note that in the apparatus shown in FIG. 4 as well, it is possible to use an optical filter that blocks excitation and allows light to pass through, as in the apparatus shown in FIG. Furthermore, when reading light information recorded on recording paper that is transparent to infrared light,
As shown in Figures 3 and 4, the excitation light source, poppy, and optical signal detection unit may be installed in the same direction relative to the recording paper, or may be installed with the recording paper sandwiched between them. is self-evident.
以上説明してきた本発明の情報読み取り方式および記録
用紙は特徴をまとめると次の如くである。The characteristics of the information reading method and recording paper of the present invention described above are summarized as follows.
１ 所定の物体にネオジムイオンおよびイッテルビウム
イオンとで賦活されたけし、光体で記録された情報を、
ネオジムイオンを励起し得る波長７９０〜８５仇ｍなる
励起光で励起し、波長９００〜１１０仇ｍに感度を有す
る光検知器で前記情報を読み取ることを特徴とする情報
読み取り方式。1. Information recorded by a light object is activated by neodymium ions and ytterbium ions on a given object.
An information reading method characterized in that neodymium ions are excited with excitation light having a wavelength of 790 to 85 m, and the information is read with a photodetector sensitive to wavelengths of 900 to 110 m.
２ ネオジムイオンとイッテルビウムイオンにより賦活
されたけい光体を用いて数字、文字、文様、符号などの
情報が記録された記録用紙。2 Recording paper on which information such as numbers, letters, patterns, and codes are recorded using phosphors activated by neodymium ions and ytterbium ions.
以上、本発明はネオジムイオンの赤外における大きい吸
収断面積を利用し、ネオジムイオンからイッテルビウム
イオンへのエネルギー伝達により、通常のシリコン光検
出器の分光感度に、より良く適合したイッテルビウムイ
オンの発光を得、その結果、シリコン光検出器を用いた
場合の発光出力を飛躍的に増大せしむることを可能とし
た。以下、本発明を実施例を参照して詳細に説明する。
実施例 １
けし、光体ＬｉＮｄ船Ｙｂｏ，．Ｐ４０，２（粒径５仏
ｍ）を重量比で２０とり、それにセルロースアセテート
樹脂６、可塑剤ジオクチルアゼレート１４、溶媒メチル
エチルケトン３５とを混合し、インキ組成物を形成し、
ポリエチレン薄膜上に２５山ｍの膜厚で塗布し、転写用
タイプリボンを製作した。As described above, the present invention utilizes the large absorption cross-section of neodymium ions in the infrared region and transfers energy from neodymium ions to ytterbium ions, thereby producing light emission from ytterbium ions that better matches the spectral sensitivity of ordinary silicon photodetectors. As a result, it has become possible to dramatically increase the light emission output when using a silicon photodetector. Hereinafter, the present invention will be explained in detail with reference to Examples.
Example 1 Poppy, light body LiNd ship Ybo, . P40,2 (particle size: 5 French m) was taken at a weight ratio of 20, and mixed with 6 cellulose acetate resin, 14 plasticizer dioctyl azelate, and 35 solvent methyl ethyl ketone to form an ink composition,
A transfer type ribbon was produced by coating a polyethylene thin film with a film thickness of 25 m.
上記タイプリボンを用いて、タイプすることによって所
定のコードを印字した記録用紙を作成した。Recording paper on which a predetermined code was printed was prepared by typing using the above-mentioned type ribbon.
上記の如くけし、光体を記録用紙の様な用い方をする場
合インク組成物とするのが良い。インク組成物を製造す
るにあたっては一般に周知の方法に従がえば良い。即ち
樹脂、可塑剤およびけし、光体溶媒を用いて混合する。
この溶液で所望形状の塗膜を形成すれば良い。記録され
た情報の読み取りを第３図に示した読み取り装置で行な
った。As mentioned above, when the light material is used as a recording paper, it is preferable to use it as an ink composition. In producing the ink composition, generally known methods may be followed. That is, the resin, plasticizer, and poppy are mixed using a photogenic solvent.
A coating film having a desired shape may be formed using this solution. The recorded information was read using the reading device shown in FIG.
励起光源３は８０仇ｍに発光ピークを持つＧａＡＩ兆赤
外発光ダイオードである。記録用紙１上に記録されリブ
い光体含有インク組成物２からの発光は、発光ガイド４
を通り、シリコンＰＩＮ光検出器６で検知される。５は
０．５ｍｍ濃厚の１芯多結晶を用いたフィルターであり
、約９５０ｎｍ以下の波長の光、すなわち、用紙および
、けし、光インクに反射して光ガイド４にとに込まれた
励起光源の光をカットトする。The excitation light source 3 is a GaAI trillion infrared light emitting diode with an emission peak at 80 m. The light emitted from the ribbed photon-containing ink composition 2 recorded on the recording paper 1 is emitted by a light emitting guide 4.
, and is detected by the silicon PIN photodetector 6. Reference numeral 5 is a filter using a 0.5 mm thick single-core polycrystal, and the excitation light source emits light with a wavelength of about 950 nm or less, which is reflected on the paper, poppy, and optical ink and is embedded in the light guide 4. cut out the light.
カード走行速度２０ｃｍ／ｓｅｃにおける印字されたコ
ードの読み取り正答率は９９．９９％以上であった。The correct answer rate for reading the printed code at a card running speed of 20 cm/sec was 99.99% or more.
また、次の如き材料を記録用けし、光体として採用した
場合にも同様の情報読み取り正答率が得られた。Furthermore, similar information reading accuracy rates were obtained when the following materials were used as recording holders and light bodies.
これまで製作したカードのけし、光インキの印字してあ
る表面を市販のマジックインク（赤，黒，青，緑）で汚
染させた。The poppy and optical ink printed surfaces of the cards produced so far were contaminated with commercially available magic ink (red, black, blue, and green).
次いでこれまでと同じ方法で、記録されたコードの読み
取り試験を行なった。読み取り結果の正答率は９９．９
９％以上であつた。このように本発明の情報の読み取り
方式および記録用紙はマジックインクの汚染に対しても
十分にその効果を発揮するものである。Next, a reading test of the recorded code was conducted using the same method as before. The correct answer rate of reading results is 99.9
It was over 9%. As described above, the information reading method and recording paper of the present invention are sufficiently effective against contamination of magic ink.
実施例 ２
Ｍｅ（Ｎｄ，Ｙｂ）Ｐ３０９系材料であるけい光体Ｃｅ
ｏ．がヰ．４ＹｂＭＰ３０９をボールミル装置で微粉砕
し、平均粒径３仏ｍとした後、実施例１と同じ仕様で転
写用タイプリボンを製作した。Example 2 Phosphor Ce, which is a Me(Nd, Yb)P309-based material
o. Gai. 4YbMP309 was finely pulverized using a ball mill to have an average particle size of 3 mm, and then a transfer type ribbon was manufactured according to the same specifications as in Example 1.
上記タイプリボンを用いて、所定のコードを印字したカ
ードを作成し、第４図の装置で読み取りを行なった。A card with a predetermined code printed thereon was prepared using the type ribbon described above, and read using the apparatus shown in FIG. 4.
第４図で、カード１は左から右へｌｍ／ｓｅｃの速さで
移動し、励起光源３は、８０仇ｍに発光ピ−クを持つＧ
ａＡＩＡｓ赤外発光ダイオードで、その発光は、不透明
なスリット８にさえぎられて、光ガイド４には到達しな
い。減衰途中（刺激を断った後）のけし、光は光ガイド
４にとり込まれシリコンＰＩＮ光検出器６で検出される
。読み取り正答率は９９．９９％以上であった。さらに
実施例１と同様な汚染を記録用紙にほどこした場合にも
、９９．９９％以上の読み取り正答率が得られた。実施
例 ３
一般式ＡＩ３Ｎも．９Ｙｂｏ．，＆○，２であらわされ
るけし、光体粉末２００餅を塩化ビニール系樹脂１６０
餅、可塑性４０群および溶媒メチルィソブチルケトン４
００釘と混合し、印刷用インク組成物を形成した。In Fig. 4, the card 1 moves from left to right at a speed of 1 m/sec, and the excitation light source 3 has a G
The aAIAs infrared light emitting diode, whose light emission is blocked by the opaque slit 8 and does not reach the light guide 4. During attenuation (after the stimulation is cut off), the light is taken into the light guide 4 and detected by the silicon PIN photodetector 6. The reading accuracy rate was over 99.99%. Furthermore, even when the recording paper was contaminated in the same manner as in Example 1, a reading accuracy rate of 99.99% or more was obtained. Example 3 General formula AI3N also. 9Ybo. ,&○,2, 200 pieces of poppy powder and 160 pieces of vinyl chloride resin.
Mochi, plasticity group 40 and solvent methyl isobutyl ketone 4
00 nail to form a printing ink composition.
次いでポリエチレン薄膜上に２５ｒｍの膜厚で塗布、乾
燥し、転写用のタイプリボンを製作した。上記タイプリ
ボンを用いて、所定のコードを記録した用紙を作り、記
録されたコードの読み取りを行なった。読み取り装置は
、８０仇帆に発光ピークを持つ○ａ山Ａｓ赤外発光ダイ
オードをけし、光体の励起光源とし、光ファイバー、ｌ
ｎＰ厚膜フィルターおよびシリコンフオトダィオードを
組み合せたけし、光信号検出器を備えており、さらに、
けし、光信号を判読し表示する回路を備えている。読み
取りの正答率は９９．９９％以上であった。次いで、前
述のけし、光コードの記録された用紙を市販の赤、青、
黒のマジックインキを用いて、コード上およびコードで
記録されていない用紙上を着色した。Next, it was coated on a polyethylene thin film to a film thickness of 25 rms and dried to produce a type ribbon for transfer. Using the type ribbon described above, paper with a predetermined code recorded thereon was made, and the recorded code was read. The reading device uses an A-mount As infrared light emitting diode with an emission peak at 80°C as an excitation light source for the light body, and an optical fiber, l
It is equipped with an optical signal detector that combines an nP thick film filter and a silicon photodiode, and furthermore,
It is equipped with a circuit that reads and displays optical signals. The reading accuracy rate was over 99.99%. Next, the above-mentioned paper with the optical code recorded on it was coated with commercially available red, blue,
Black marker ink was used to color the code and the paper not recorded with the code.
上記用紙を、前述の読み取り装置を用いて読み取りテス
トを行なった。読み取りを誤った割合は１方回に１回以
下であった。また山３Ｙｏ．２ＮｄＭＹふ．，ＫＯ，２
のけし、光体を用いても同等の効果を得ることができた
。A reading test was performed on the above-mentioned paper using the above-mentioned reading device. The rate of erroneous reading was less than once per round. Also mountain 3Yo. 2NdMYfu. ,KO,2
The same effect could be obtained by using a light object.
なお本発明を、主として紙を用いて構成した用紙につい
て述べてきたが、本発明は紙に限らず、プラスチック、
布、ゴムまたは金属の薄板などにも容易に用いることが
でき、また磁性粉を塗布し、磁気コードを用いて情報を
読み取る用紙にも併用して用いることができることは自
明である。Although the present invention has been described mainly with respect to paper constructed using paper, the present invention is not limited to paper, and can be applied to plastics,
It is obvious that it can be easily used for cloth, rubber, or thin metal plates, and can also be used in conjunction with paper coated with magnetic powder and on which information is read using a magnetic code.
従がつて、本発明に用いた記録用紙なる用語は、上述の
各種材質のものを含むものである。Therefore, the term "recording paper" used in the present invention includes those made of the various materials mentioned above.
第１図はシリコン光検出器の一例の相対感度スペクトル
である。
第２図ａは本発明の一実施例のけい光体Ｎｄｏ．肘ｂｏ
．ぽ５０．４の発光スペクトルｂはＮｄｏ．８Ｙｂｏ．
刈るＭｇ２（ＶＱ）３の発光スペクトルである。第３図
は本発明の方式にもとずく記録用紙および情報読み取り
装置の概念図であり、１は記録用紙、２はけし、光イン
キ、３は励起光源、４は光ガイド、５は光フィルター、
６はシリコン光検出器、７は検出信号の増幅および判別
回路である。第４図は、本発明の方式にもとずく記録用
紙および情報読み取り装置の概念図であり、１は記録用
紙、２はけし、光インキ、３は励起光源、４は光ガイド
、６はシリコン光検出器、７は検出信号の増幅および判
別回路であり、８は、不透明なスリットである。努７図
努之図
多〆図
多４図FIG. 1 is a relative sensitivity spectrum of an example of a silicon photodetector. FIG. 2a shows a phosphor Ndo according to an embodiment of the present invention. elbow bo
．． The emission spectrum b of Po50.4 is Ndo. 8Ybo.
This is an emission spectrum of Mg2(VQ)3. FIG. 3 is a conceptual diagram of a recording paper and an information reading device based on the method of the present invention, where 1 is a recording paper, 2 is a brush, optical ink, 3 is an excitation light source, 4 is a light guide, and 5 is an optical filter. ,
6 is a silicon photodetector, and 7 is a detection signal amplification and discrimination circuit. FIG. 4 is a conceptual diagram of a recording paper and an information reading device based on the method of the present invention, where 1 is a recording paper, 2 is a brush, optical ink, 3 is an excitation light source, 4 is a light guide, and 6 is silicon. The photodetector 7 is a detection signal amplification and discrimination circuit, and 8 is an opaque slit. Tsutomu 7 illustration Tsutomu no zu 〆 zu 4 illustration
Claims (1)
イオンとで賦活されたけい光体で記録された情報を、ネ
オジムイオンを励起し得る波長７９０−８５０ｎｍなる
励起光で励起し、波長９００−１１００ｎｍに感度を有
する光検出器で情報を読み取ることを特徴とする情報読
み取り方式。1 Information recorded on a given object by a phosphor activated with neodymium ions and ytterbium ions is excited with excitation light with a wavelength of 790-850 nm that can excite neodymium ions, and sensitivity is set to wavelengths of 900-1100 nm. An information reading method characterized by reading information using a photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52099582A JPS6029996B2 (en) | 1977-08-22 | 1977-08-22 | Information reading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52099582A JPS6029996B2 (en) | 1977-08-22 | 1977-08-22 | Information reading method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5433634A JPS5433634A (en) | 1979-03-12 |
| JPS6029996B2 true JPS6029996B2 (en) | 1985-07-13 |
Family
ID=14251088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52099582A Expired JPS6029996B2 (en) | 1977-08-22 | 1977-08-22 | Information reading method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029996B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995025148A1 (en) * | 1994-03-17 | 1995-09-21 | Hitachi Maxell, Ltd. | Phosphor, phosphor composition, fluorescent mark carrier, and optical character reader |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392056A (en) * | 1981-04-27 | 1983-07-05 | Automated Packaging Systems, Inc. | Control marking detector |
| US5210411A (en) * | 1990-06-29 | 1993-05-11 | Hitachi Maxell, Ltd. | Detection mark and method and apparatus for detecting mark |
| US5220166A (en) * | 1991-09-09 | 1993-06-15 | Nemoto & Co., Ltd. | Information reading method |
| GB2259598B (en) * | 1991-09-10 | 1994-10-12 | Nemoto Tokushu Kagaku Kk | Information reading method |
| US5463212A (en) * | 1992-05-07 | 1995-10-31 | Hitachi Maxell, Ltd. | Latent image forming member and method of manufacturing, latent image reading apparatus and latent image reading system |
| WO2006104081A1 (en) | 2005-03-29 | 2006-10-05 | Nemoto & Co., Ltd. | Infra-red light emitting fluorescent substance |
| JP5143673B2 (en) * | 2008-08-29 | 2013-02-13 | 根本特殊化学株式会社 | Infrared light emitting phosphor |
| US8993101B2 (en) * | 2011-11-15 | 2015-03-31 | Honeywell International Inc. | Luminescent borates, materials and articles incorporating such borates, and methods and apparatus for their production and use in article authentication |
| US9074137B2 (en) * | 2011-11-15 | 2015-07-07 | Honeywell International Inc. | Luminescent borates, materials and articles incorporating such borates, and methods and apparatus for their production and use in article authentication |
| US9062220B2 (en) * | 2012-11-30 | 2015-06-23 | Honeywell International Inc. | Luminescent borates, luminescent materials and articles incorporating such borates |
-
1977
- 1977-08-22 JP JP52099582A patent/JPS6029996B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995025148A1 (en) * | 1994-03-17 | 1995-09-21 | Hitachi Maxell, Ltd. | Phosphor, phosphor composition, fluorescent mark carrier, and optical character reader |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5433634A (en) | 1979-03-12 |
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