JPH0549185B2 - - Google Patents
Info
- Publication number
- JPH0549185B2 JPH0549185B2 JP62299418A JP29941887A JPH0549185B2 JP H0549185 B2 JPH0549185 B2 JP H0549185B2 JP 62299418 A JP62299418 A JP 62299418A JP 29941887 A JP29941887 A JP 29941887A JP H0549185 B2 JPH0549185 B2 JP H0549185B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- bottle
- image sensor
- bottle bottom
- optical
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 72
- 238000007689 inspection Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000005286 illumination Methods 0.000 description 8
- 239000012780 transparent material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229920000298 Cellophane Polymers 0.000 description 3
- 235000013405 beer Nutrition 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000013334 alcoholic beverage Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/9018—Dirt detection in containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0078—Testing material properties on manufactured objects
- G01N33/0081—Containers; Packages; Bottles
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ガラス等の透明材より成る壜の底を
検査する壜底検査装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bottle bottom inspection device for inspecting the bottom of a bottle made of a transparent material such as glass.
酒類、飲用又は薬用液等のガラスの如き透明材
より成る壜は、現状においては未だ多く利用され
ていると言える。この中にあつて、ビール壜等の
酒類に用いられる壜は、最終消費者の手に渡つた
後、再び回収され、再利用されている場合が多く
見受けられる。この場合、回収された壜は、工場
において充分な洗浄工程を経た後、ビール等の液
の充填を行つて、再出荷される。
BACKGROUND OF THE INVENTION At present, bottles made of transparent materials such as glass for alcoholic beverages, drinking or medicinal liquids, etc. are still widely used. Among these, bottles used for alcoholic beverages, such as beer bottles, are often collected and reused after reaching the end consumer. In this case, the collected bottles undergo a thorough cleaning process at the factory, are then filled with liquid such as beer, and then shipped again.
然し乍ら、斯る回収壜は、新壜と異なり、複雑
な流通経路を長時間に渡つて経てきているので、
その間に、その口部が欠けたり、胴部に傷がつい
たり、壜内に種々の異物が投入されたりして、再
利用するには不適な不良壜となつているものも多
くある。 However, unlike new bottles, such recycled bottles have been passed through complicated distribution channels for a long time, so
During that time, many bottles become defective and unsuitable for reuse, with their mouths chipped, their bodies damaged, and various foreign objects thrown into the bottles.
そこで、最近では、イメージセンサー、電子処
理機等を組合わせて、このような壜の不具合を発
見し、壜が不良であることを示す信号を出力する
空壜検査機が普及している。この従来の空壜検査
機の検査対象項目としては、主として壜の口部、
胴部、底部の３個所がある。従つて、従来の空壜
検査機は、これ等検査対象を、夫々異る位置に配
置された別々の検査装置で検査している。この中
で、壜の底部の検査は、種々の理由から大変重要
視されるものである。即ち、壜内のビール等の液
体の飲用後の壜の流通過程の中で、壜口からその
内部へ、煙草の吸殻、その外装のセロフアンや、
壜のキヤツプや、ストロー等を押し入れたり、壜
口が破損した際の破片が壜内に入つたりしたもの
等の異物が、前述の工場における壜の洗浄工程を
経た後も、壜より完全に除去されずに残存してい
る場合が多いからである。そして、これらの異物
には、不透明異物や、或いはガラス破片や、煙草
の外装に用いられていたセロフアンのような透明
な異物等、種々光学的性質の異なる種類のものが
混ざつているので、そのすべてを一遍に検出する
ことの出来る壜底検査装置を作ることは仲々むず
かしい。 Recently, empty bottle inspection machines have become popular, which use a combination of image sensors, electronic processors, etc., to detect defects in bottles and output signals indicating that the bottles are defective. The items to be inspected by this conventional empty bottle inspection machine are mainly the mouth of the bottle,
There are three parts: the body and the bottom. Therefore, in the conventional empty bottle inspection machine, these inspection objects are inspected using separate inspection devices arranged at different positions. Among these, inspection of the bottom of the bottle is of great importance for various reasons. That is, during the distribution process of the bottle after drinking beer or other liquid inside the bottle, cigarette butts, cellophane on the exterior, etc.
Even after the bottle cleaning process at the factory mentioned above, foreign objects such as bottle caps, straws, etc. that have been pushed into the bottle, or debris that has fallen into the bottle when the bottle opening is broken, are completely removed from the bottle. This is because they often remain without being removed. These foreign substances include a mixture of various types of foreign substances with different optical properties, such as opaque foreign substances, glass fragments, and transparent foreign substances such as cellophane used in the exterior of cigarettes. It is extremely difficult to create a bottle bottom inspection device that can detect all of these at once.
次に、上述した従来の透明な壜の壜底検査装置
の一例を、第４図を参照して説明する。第４図に
おいて、１は被検査物の一例である壜、２は壜１
の口部の上方に配されたビデオカメラ等の如きイ
メージセンサ、３はセンサ２からの電気信号を処
理して、壜１の良否の判定処理を行う電子処理機
である。次いで、壜１の壜底１Ａにある異物をセ
ンサ２に映像として映し出す為の光源として、照
明灯４と例えば、すりガラスより成る円板状の光
拡散板５とを、壜底１Ａの下方に第４図の如く配
置する。即ち、第４図に示す如く、壜１の中心軸
がイメージセンサ２の光軸０−０と一致し、光拡
散板５の板面は光軸０−０に垂直（壜底１Ａに
略々平行）、その直径は壜底１Ａより大きく、そ
の中心は略々光軸０−０上に在り、照明灯４は、
光拡散板５を介してのみ壜底１Ａを下方より上方
へ照明する。従つて、この場合、光拡散板５は、
壜底１Ａに対し、あたかも平面的な二次照明板
（光源）の作用をなし、センサ２には、均一な明
るさを有する、壜底１Ａに対する明るい背景（明
視野）として映る。従つて、若し、壜底１Ａに不
透明又は半透明な異物が存在すれば、この異物
を、上述の明るい背景（明視野）の中の黒（暗）
い影としてセンサ２が捉え、これに基づき、電子
処理機３は異常の信号を発する。 Next, an example of the conventional transparent bottle bottom inspection apparatus mentioned above will be explained with reference to FIG. In Fig. 4, 1 is a bottle which is an example of the object to be inspected, and 2 is a bottle 1.
An image sensor such as a video camera or the like placed above the mouth of the bottle 3 is an electronic processor that processes electrical signals from the sensor 2 to determine whether the bottle 1 is good or bad. Next, an illumination lamp 4 and a disk-shaped light diffusing plate 5 made of, for example, ground glass are placed below the bottle bottom 1A as a light source for projecting an image of foreign matter on the bottle bottom 1A of the bottle 1 onto the sensor 2. 4 Arrange as shown in figure. That is, as shown in FIG. 4, the central axis of the bottle 1 coincides with the optical axis 0-0 of the image sensor 2, and the plate surface of the light diffusing plate 5 is perpendicular to the optical axis 0-0 (approximately parallel to the bottom 1A of the bottle). parallel), its diameter is larger than the bottle bottom 1A, its center is approximately on the optical axis 0-0, and the illumination lamp 4 is
The bottle bottom 1A is illuminated from below to above only through the light diffusing plate 5. Therefore, in this case, the light diffusing plate 5 is
It acts as if it were a planar secondary illumination plate (light source) for the bottle bottom 1A, and appears on the sensor 2 as a bright background (bright field) with uniform brightness relative to the bottle bottom 1A. Therefore, if there is an opaque or semi-transparent foreign substance in the bottle bottom 1A, this foreign substance can be detected as a black (dark) object in the above-mentioned bright background (bright field).
The sensor 2 detects this as a dark shadow, and based on this, the electronic processor 3 issues an abnormality signal.
さて、上述の如き従来の壜底検査装置において
は、壜底１Ａに存在する異物が、上述の如く黒い
もの、即ち不透明、若しくは半透明なものであれ
ば、センサ２が、これを壜底１Ａの明るい背影の
中の影として捉えて、検出することは容易である
が、例えばガラス破片、若しくはセロハンの如き
透明な異物の場合は、光拡散板５よりの光は、殆
んど異物を通過してしまうので、かかる異物は影
としてセンサ２に映らなく、例え影として映つた
としても、極めて淡い影なので、検出することは
困難であつた。
Now, in the conventional bottle bottom inspection apparatus as described above, if the foreign matter present in the bottle bottom 1A is black as described above, that is, opaque or semitransparent, the sensor 2 detects the foreign matter in the bottle bottom 1A. However, in the case of a transparent foreign object such as broken glass or cellophane, most of the light from the light diffusing plate 5 passes through the foreign object. Therefore, such a foreign object does not appear as a shadow on the sensor 2, and even if it appears as a shadow, it is difficult to detect because it is an extremely faint shadow.
従つて、本発明は、壜底上の不透明な異物、半
透明な異物及び透明な異物など、全ての異物を検
出し得る壜底検査装置を提供せんとするものであ
る。 Therefore, it is an object of the present invention to provide a bottle bottom inspection device capable of detecting all kinds of foreign substances such as opaque foreign substances, translucent foreign substances, and transparent foreign substances on the bottle bottom.
本発明によれば、壜１の壜口の上方に第１のイ
メージセンサ２を配置し、上記壜の壜底１Ａをそ
の下方より光拡散板５を介して光源４により照明
し、上記壜底を上記壜口を通じて上記第１のイメ
ージセンサ２により撮映し、その出力を第１の電
子処理機３により処理して不透明及び半透明な異
物が上記壜底上に存在するか否かを検査すると共
に、第２のイメージ半導体２′を上記第１のイメ
ージセンサ２とは異る上記壜口上の位置に設け、
その出力を処理する第２の電子処理機３′を設け、
上記壜底と上記光源との間に該光源よりの光が上
記壜底にその外側下方より斜めして入射するよう
になす光学手段７，７Ａを設け、上記壜口と上記
第１及び第２のイメージセンサとの間に上記光源
よりの壜口を通つた光を２個の別々の光に分割す
る光分割手段１０を設け、上記光拡散板５に或る
光を通過させる第１の光学フイルタ１１を設ける
と共に、上記光分割手段１０と上記第２のイメー
ジセンサ２′との間に上記第１の光学フイルタ１
１を通過した光の通過を阻止する第２の光学フイ
ルタ１２を設け、上記第２のイメージセンサ２′
及び第２の電子処理機３′により上記壜底上に透
明な異物が在るか否かを検査するようになしたこ
とを特徴とする壜底検査装置が得られる。
According to the present invention, the first image sensor 2 is disposed above the mouth of the bottle 1, and the bottom 1A of the bottle is illuminated from below by the light source 4 through the light diffusing plate 5. is imaged by the first image sensor 2 through the mouth of the bottle, and the output thereof is processed by the first electronic processor 3 to examine whether opaque or translucent foreign matter exists on the bottom of the bottle. At the same time, a second image semiconductor 2' is provided at a position on the mouth of the bottle different from that of the first image sensor 2,
a second electronic processor 3' is provided for processing the output;
Optical means 7, 7A are provided between the bottle bottom and the light source to allow light from the light source to enter the bottle bottom obliquely from the outside downward direction, and the bottle mouth and the first and second A light splitting means 10 for splitting the light from the light source that passes through the bottle mouth into two separate beams is provided between the image sensor and the first optical system that allows a certain light to pass through the light diffusing plate 5. A filter 11 is provided, and the first optical filter 1 is provided between the light splitting means 10 and the second image sensor 2'.
A second optical filter 12 is provided to block the passage of light that has passed through the second image sensor 2'.
A bottle bottom inspection apparatus is obtained, characterized in that the second electronic processor 3' inspects whether or not there is a transparent foreign substance on the bottle bottom.
本発明による壜底検査装置においては、光源４
よりの光を、光拡散板５及び光学フイルタ１２を
介して壜底１Ａその直下より導入する一方、光学
手段７，７Ａによりその外側下方より斜め、即ち
所定の夫々異る入射角を以つて入射させるように
なし、壜底１Ａをその下方より上方に通過する光
も、壜底１Ａに対し、夫々異る傾斜を以つて出射
するようになし、壜底１Ａ上に不透明又は半透明
な異物が在る時は、壜底１Ａをその直下より通過
した光が、異物によりその通過が阻止されること
により、この異物をイメージセンサ２及び電子処
理機３で検出する。一方、異物が透明な異物であ
る場合は、壜底１Ａより斜めに出射する光が、異
物のいずれかの表面で反射し、それ等反射光（又
はその一部）が、壜１の壜口の上方に配置したイ
メージセンサ２′により受光される。この時、イ
メージセンサ２′は信号を出力し、これが電子処
理機３′に供給される。この電子処理機３′は、イ
メージセンサ２′より信号を受けた時のみ信号、
即ち異物の存在を示す信号を出力する。
In the bottle bottom inspection device according to the present invention, the light source 4
While the light is introduced from directly below the bottle bottom 1A via the light diffusing plate 5 and the optical filter 12, the light is incident from below on the outside by the optical means 7, 7A obliquely, that is, at predetermined different incident angles. In this way, the light passing through the bottle bottom 1A from the bottom to the top is also emitted at different angles to the bottle bottom 1A, so that opaque or translucent foreign matter is not present on the bottle bottom 1A. When there is a foreign object, the light passing through the bottle bottom 1A from directly below is blocked by the foreign object, and this foreign object is detected by the image sensor 2 and the electronic processor 3. On the other hand, if the foreign object is a transparent foreign object, the light emitted obliquely from the bottle bottom 1A will be reflected on one of the surfaces of the foreign object, and the reflected light (or a part of it) will be reflected from the bottle opening of bottle 1. The light is received by an image sensor 2' placed above the . At this time, the image sensor 2' outputs a signal, which is supplied to the electronic processor 3'. This electronic processor 3' receives a signal only when it receives a signal from the image sensor 2'.
That is, it outputs a signal indicating the presence of foreign matter.
本発明の主目的は、上述した如く、壜底の上に
在る不透明材、半透明材よりなる異物は勿論、透
明材よりなる異物（被検査物）をも検出すること
である。
As mentioned above, the main purpose of the present invention is to detect not only foreign objects made of opaque or translucent materials on the bottom of the bottle, but also foreign objects (objects to be inspected) made of transparent materials.
本発明の全体の説明に先だち、本発明による透
明な異物の検出に就いて説明する。 Before explaining the entirety of the present invention, detection of transparent foreign matter according to the present invention will be explained.
透明材とはいえ、空気とは、その光学的性質が
異なるので、その表面に斜めに入射する（垂直以
外）光の一部は必ずそこで反射する。この際、そ
の入射角が大（全反射を起こす臨界角より小さな
入射角）であれば、その表面での反射光の量が増
加する。本発明の透明な異物の検出は、上記光の
特性を利用するものである。そのため、壜底の下
方よりこの壜底に入射する光源よりの光の入射角
を、大（臨界角よりは小）となすと共に、種々の
値となし、壜底に入り、屈折し、そこより出る光
（壜底へ入射した光と平行）が、壜底上の透明材
より成る異物のいずれかの表面に所定の入射角
（0゜よりは大であるが臨界角よりは小なる角）を
以つて入射し、そこで反射され、イメージセンサ
に到達し得る如くなす。 Although it is a transparent material, its optical properties are different from air, so a portion of the light incident obliquely (other than perpendicularly) on its surface is always reflected there. At this time, if the angle of incidence is large (an angle of incidence smaller than the critical angle that causes total internal reflection), the amount of reflected light on the surface increases. Detection of transparent foreign matter according to the present invention utilizes the above characteristics of light. Therefore, the angle of incidence of the light from the light source that enters the bottom of the bottle is made large (smaller than the critical angle) and various values, so that it enters the bottom of the bottle, is refracted, and from there. The emitted light (parallel to the light incident on the bottom of the bottle) hits any surface of a foreign object made of transparent material on the bottom of the bottle at a predetermined angle of incidence (larger than 0° but smaller than the critical angle). The light enters the image sensor, is reflected there, and reaches the image sensor.
以下、上述した本発明による（透明な異物を検
査する）壜底検査装置の一実施例を、その略線図
である第２図を参照して説明する。尚、第２図に
於て、第４図と対応する部分には同一符号を付
し、それ等の詳細説明は省略する。 Hereinafter, an embodiment of the bottle bottom inspection apparatus (for inspecting transparent foreign matter) according to the present invention described above will be described with reference to FIG. 2, which is a schematic diagram thereof. In FIG. 2, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and detailed explanation thereof will be omitted.
第２図に示す本発明の例に於ては、壜底１Ａと
照明灯又は光源４との間に、第４図に示す従来の
光拡散板５の代りに、壜底１Ａの外径より大なる
外径で、不透明材より成る円板状の遮光板６を、
光拡散板５と同様に、前両者と夫々離れて配置す
ると共に、縦断面が台形で、その小なる内径でも
遮光板６の外径より大なる筒状の光反射板（鏡）
７を、その中心軸が光軸０−０に略々一致し、遮
光板６の外側をそれより離れて包囲する如く配設
する。ここで、第２図に示す如く、光反射鏡７の
大径の開口が照明灯４側に配置されている。その
他の部分は、第４図に示す従来例と略々同一であ
る。 In the example of the present invention shown in FIG. 2, between the bottle bottom 1A and the illumination lamp or light source 4, instead of the conventional light diffusing plate 5 shown in FIG. A disc-shaped light shielding plate 6 made of an opaque material with a large outer diameter is
Similar to the light diffusing plate 5, a cylindrical light reflecting plate (mirror) is arranged separately from the front two and has a trapezoidal longitudinal section, and even its small inner diameter is larger than the outer diameter of the light shielding plate 6.
7 is arranged so that its central axis substantially coincides with the optical axis 0-0 and surrounds the outside of the light shielding plate 6 at a distance from it. Here, as shown in FIG. 2, the large diameter opening of the light reflecting mirror 7 is arranged on the side of the illuminating lamp 4. Other parts are substantially the same as the conventional example shown in FIG.
第２図に示す本発明の例に於では、照明灯４よ
り発射された光は、壜底１Ａの外径より大なる外
径の遮光板６があるので、壜底１Ａに直接入射せ
ず、同図に於いて代表的に２本の光路ｌ１，ｌ２
で示す如く、遮光板６の外側に配された光反射鏡
７の内周面（鏡面）７Ａに向う発散する如き光の
部分がそこで反射され、壜底１Ａの外周外側より
壜底１Ａに向つて斜めに、即ち所定の入射角（0゜
よりは大きく全反射を起す臨界角よりは小なる
角）を以つて入射する。この場合、上述した如
く、遮光板６の外径は壜底１Ａの外径より大に選
択されているので、遮光板６は、第４図の光拡散
板５とは逆に、イメージセンサ２′に対して、壜
底１Ａを介して略々暗視野となる。尚、遮光板６
の少くとも壜底１Ａに対向する表面は、後述の理
由により、光を可能な限り反射しないような、無
反射処理を施し、不要な反射光が壜底１Ａに再入
射しないようにすることが望ましい。 In the example of the present invention shown in FIG. 2, the light emitted from the illumination lamp 4 does not directly enter the bottle bottom 1A because there is a light shielding plate 6 with an outer diameter larger than the outer diameter of the bottle bottom 1A. , In the same figure, two optical paths l1 and l2 are representative.
As shown in , the part of the light that diverges toward the inner circumferential surface (mirror surface) 7A of the light reflecting mirror 7 arranged outside the light shielding plate 6 is reflected there, and is reflected from the outer circumferential side of the bottle bottom 1A toward the bottle bottom 1A. Then, the light is incident obliquely, that is, at a predetermined angle of incidence (an angle greater than 0° and smaller than the critical angle at which total internal reflection occurs). In this case, as described above, the outer diameter of the light shielding plate 6 is selected to be larger than the outer diameter of the bottle bottom 1A. ', there is a substantially dark field through the bottle bottom 1A. In addition, the light shielding plate 6
At least the surface facing the bottle bottom 1A should be treated with anti-reflection treatment to prevent as much light as possible from reflecting, for the reasons described later, to prevent unnecessary reflected light from re-entering the bottle bottom 1A. desirable.
第３図は、第２図の壜１の壜底１Ａ、遮光板６
及び光反射鏡７の一部の拡大図である。同図を参
照して、第２図に示す壜底検査装置の一例の動作
を説明する。 Figure 3 shows the bottle bottom 1A and the light shielding plate 6 of bottle 1 in Figure 2.
and a partially enlarged view of the light reflecting mirror 7. The operation of an example of the bottle bottom inspection apparatus shown in FIG. 2 will be described with reference to the same figure.
今、壜底１Ａに異物がないとすれば、第２図に
示す照明灯４よりの光路ｌ２に沿つた光は、第３
図に示す如く、光反射鏡７の鏡面７Ａに入射角
（i1）で入射する。そこで反射角（γ1）で反射さ
れた光は、光路Ｌ２に沿つて壜底１Ａの下面に入
射角(i)で入射し、一部はそこで反射角（γ）で反
射され、光路Ｌ３に沿つて遮光板６へ向うが、他
部は壜底１Ａの下面で屈折して壜底１Ａ内に入
り、そこを進み、その上面で再び屈折して、壜底
１Ａの上面より光路Ｌ４に沿つて斜め上方へ進
み、更に壜１の胴部１Ｂを通過し、壜１の外側に
出る。この時、光路Ｌ２及びＬ４は平行であるの
は、周知の通りである。尚、光路Ｌ３に沿つて進
み、遮光板６に到る光は、上述した如く、その上
面に無反射処理が施こされているので、そこで反
射され、再び壜底１Ａに向うことは、殆んどな
い。 Now, assuming that there is no foreign matter in the bottle bottom 1A, the light along the optical path l2 from the illuminating lamp 4 shown in FIG.
As shown in the figure, the light is incident on the mirror surface 7A of the light reflecting mirror 7 at an incident angle (i1). The light reflected at the reflection angle (γ1) then enters the bottom surface of the bottle base 1A at the incident angle (i) along the optical path L2, and a part of it is reflected there at the reflection angle (γ), and along the optical path L3. The other part is refracted at the bottom surface of the bottle bottom 1A, enters the bottle bottom 1A, travels there, is refracted again at the top surface, and is transmitted along the optical path L4 from the top surface of the bottle bottom 1A. It proceeds diagonally upward, passes through the body 1B of the bottle 1, and exits the bottle 1. As is well known, the optical paths L2 and L4 are parallel at this time. Note that the light that travels along the optical path L3 and reaches the light shielding plate 6 is almost never reflected there and directed back toward the bottle bottom 1A, since the upper surface of the light shielding plate 6 is treated with anti-reflection treatment as described above. It's not easy.
扨て、本発明に於ては、第２図に示す如く、筒
状の光反射鏡７は、その縦断面が上方が小さな台
形であるので、その鏡面７Ａも同様形状の断面を
有する。従つて、鏡面７Ａは、光軸０−０に平行
ではなく、即ち鏡面７Ａの延長線は、壜底１Ａに
直角とは異なる角で交わる。従つて、光路Ｌ２に
沿つて壜底１Ａに入射する光の入射角(i)は、所定
の角度（0゜より大きく、臨界角より小）である。
換言すれば、光路Ｌ２に沿い、壜底１Ａにその斜
め下方より入射し、壜底１Ａ内に入つた光は、そ
の上方に斜めに出て（光路Ｌ４に沿つて進み）、
イメージセンサ２′には到達しない。従つて、異
物がない場合は、遮光板６の作用により、イメー
ジセンサ２′は光を全く受けないので、何等出力
を発生せず、従つて電子処理機３′も信号を全く
発生しない。 According to the present invention, as shown in FIG. 2, the cylindrical light reflecting mirror 7 has a trapezoidal vertical cross section with a small upper part, so its mirror surface 7A also has a similar cross section. Therefore, the mirror surface 7A is not parallel to the optical axis 0-0, that is, the extension line of the mirror surface 7A intersects the bottle base 1A at an angle different from the right angle. Therefore, the incident angle (i) of the light incident on the bottle base 1A along the optical path L2 is a predetermined angle (greater than 0° and smaller than the critical angle).
In other words, along the optical path L2, the light that enters the bottle bottom 1A from diagonally below and enters the bottle bottom 1A exits diagonally above (proceeds along the optical path L4),
It does not reach the image sensor 2'. Therefore, when there is no foreign object, the image sensor 2' does not receive any light due to the action of the light shielding plate 6, and therefore does not generate any output, and therefore the electronic processor 3' does not generate any signal at all.
一方、第３図に符号８で示す如く、壜底１Ａ上
に透明材より成る異物が存在する場合は、光路Ｌ
２に沿つて壜底１Ａに入り、そこで屈折し、壜底
１Ａの上面を離れる光路Ｌ４に沿う光は、異物８
の一部の表面８Ａで反射（入射角（i2）、反射角
（γ2））し、同図のＬ５で示す光軸０−０に略々
平行な光路に沿つて上方へ進み、第２図に示す壜
１の壜口を通じて、その上方に配置したセンサ
２′に入射する。従つて、センサ２′は、暗視野中
に異物８よりの反射光を明るい光（光点）として
捉え、異物８の存在を検出し得る。 On the other hand, as shown by reference numeral 8 in FIG. 3, if there is a foreign object made of transparent material on the bottle bottom 1A,
2, enters the bottle bottom 1A along optical path L4, is refracted there, and leaves the top surface of the bottle bottom 1A.
It is reflected (incidence angle (i2), reflection angle (γ2)) by a part of the surface 8A of , and travels upward along the optical path approximately parallel to the optical axis 0-0 indicated by L5 in the figure, The light enters the sensor 2' placed above the bottle 1 through the bottle opening shown in FIG. Therefore, the sensor 2' can detect the presence of the foreign object 8 by capturing the reflected light from the foreign object 8 as a bright light (light spot) in the dark field.
尚、この場合、光路Ｌ２に平行な他の光路に沿
つて壜底１Ａを通過し、異物８の表面８Ａに入射
する光は、この表面８Ａで反射し、その反射光
は、光路Ｌ５と平行な光路に沿つて進み、センサ
２′で捉えられる。又、光路Ｌ２に平行ではない
が、異物８の表面８Ａに入射し、そこで反射され
る光でも、センサ２′へ入射する光は存在する。 In this case, the light that passes through the bottle bottom 1A along another optical path parallel to the optical path L2 and enters the surface 8A of the foreign object 8 is reflected by this surface 8A, and the reflected light is parallel to the optical path L5. The light travels along the optical path and is captured by the sensor 2'. Further, even though the light is not parallel to the optical path L2, there is light that is incident on the surface 8A of the foreign object 8 and reflected there, and that is incident on the sensor 2'.
尚、上述は主として光路ｌ２に沿つて鏡面７Ａ
に入射する光に就いての説明であるが、上述の如
く、鏡面７Ａは光軸０−０に関して対称な台形状
の筒状の鏡面であり、円板状の遮光板６との間に
は、幅(D)のリング状の間隙があるので、その他の
異る光路に沿つて照明灯４より鏡面７Ａに入射す
る光も、そこで同様に反射され、壜底１Ａの全面
へそれぞれ異る入射角で入射し、各一部は壜底１
Ａを通過し、夫々壜底１Ａに対し異る角をなす光
路に沿つて、その上方に出る。従つて、これ等の
光のあるものは、壜底１Ａのどこに透明材よりな
る異物があつても、そのいづれかの表面部で反射
し、第３図の光路Ｌ５の如き光路に沿つて上方に
進み、センサ２′に到る。換言すれば、壜底１Ａ
の上面のどこに透明な異物が在つても、そのいず
れかの面で光が反射し、反射光がイメージセンサ
２′に到るように、壜底１Ａの全面に光が斜めに
入射するように、光反射鏡７（その鏡面７Ａ）及
び遮光板６の壜底１Ａに対する形状、寸法及び両
者の相互間の配置及び壜底１Ａに対する配置等を
選ぶ。尚、第３図に於て、Ｎ１，Ｎ及びＮ２は、
光路ｌ２，Ｌ２及びＬ４に沿つて進む光の反射点
に立てた法線を夫々示す。尚、上述は、異物８の
表面が鏡面の場合を例に挙げたが、この表面が粗
面であつても、光路Ｌ５方向に進む反射光は若干
減少するが、同時に光路Ｌ２とは異る光路の光も
この粗面で反射し、光路Ｌ５方向に進む光が増加
するので、問題はない。 Incidentally, the above description is mainly based on the mirror surface 7A along the optical path l2.
Regarding the incident light, as mentioned above, the mirror surface 7A is a trapezoidal cylindrical mirror surface symmetrical with respect to the optical axis 0-0, and there is a space between it and the disc-shaped light shielding plate 6. Since there is a ring-shaped gap with a width (D), the light incident on the mirror surface 7A from the illumination lamp 4 along other different optical paths is similarly reflected there, and is incident on the entire surface of the bottle base 1A in different ways. incident at the corner, each part is at the bottom of the bottle 1
A, and emerge above the bottle base 1A along optical paths that respectively form different angles with respect to the bottle base 1A. Therefore, no matter where on the bottle bottom 1A there is a foreign object made of a transparent material, some of this light will be reflected from one of its surfaces and will be reflected upward along the optical path such as optical path L5 in FIG. Then, it reaches sensor 2'. In other words, bottle bottom 1A
No matter where on the top surface there is a transparent foreign object, the light will be reflected from one of the surfaces and the reflected light will reach the image sensor 2', so that the light is incident obliquely on the entire surface of the bottle bottom 1A. , the shapes and dimensions of the light reflecting mirror 7 (its mirror surface 7A) and the light-shielding plate 6 relative to the bottle bottom 1A, their mutual arrangement, and their arrangement relative to the bottle bottom 1A are selected. In addition, in Fig. 3, N1, N and N2 are
The normal lines erected to the reflection points of the light traveling along the optical paths l2, L2, and L4 are shown, respectively. Note that the above example uses the case where the surface of the foreign object 8 is a mirror surface, but even if this surface is rough, the reflected light traveling in the direction of the optical path L5 is slightly reduced, but at the same time it is different from the optical path L2. The light on the optical path is also reflected by this rough surface, and the amount of light traveling in the optical path L5 direction increases, so there is no problem.
次に、第１図を参照して、本発明の透明、半透
明及び不透明な壜底上の異物等の壜底検査装置の
一例を説明する。この例は、主として第２図に示
した透明な異物検査用の本発明の例と、第４図に
示した半透明及び不透明な異物検査用の従来例と
を、特殊な光学手段を用いて組合せたものであ
る。従つて、第１図に於いて、第２及び第４図と
同一符号は、互に同一素子を示す。 Next, with reference to FIG. 1, an example of the apparatus for inspecting transparent, translucent, and opaque bottle bottoms for foreign matter on the bottom of bottles will be described. This example mainly combines the example of the present invention for inspecting transparent foreign objects shown in FIG. 2 and the conventional example for inspecting translucent and opaque foreign objects shown in FIG. 4 using special optical means. It is a combination. Therefore, in FIG. 1, the same reference numerals as in FIGS. 2 and 4 indicate the same elements.
次に、第１図に就き、本発明の壜底検査装置の
一例の構成を説明する。第１図に示す本発明の例
の特殊な光学手段は、壜１の口及びイメージセン
サ２，２′間に配置した入射光を２個の別々の光、
例えば互に90゜異る方向の光に分ける光分割手段、
例えばハーフミラ10と、光拡散板５の上又は下
（図示の例では下）に設けた光拡散板５と略々同
一形状及び寸法の或る色の光、例えば赤色光を通
過させる光学フイルタ１１と、一方のイメージセ
ンサ２′の前方に配した光フイルタ１１を通過し
た光、この例では赤色光を通過させない、例えば
青色光を通過させる光学フイルタ１２とより成
る。尚、この場合、異る色の光学フイルタ１１及
び１２の機能により、光拡散板５は、イメージセ
ンサ２′に対しては、暗現野となる。一方、光拡
散板５及び光学フイルタ１１は、イメージセンサ
２に対しては、この例では赤色の明現野となる。
その他の構成は、第２図及び第４図の例の主要部
と略々同一である。 Next, referring to FIG. 1, the configuration of an example of the bottle bottom inspection apparatus of the present invention will be described. The special optical means of the example of the invention shown in FIG.
For example, a light splitting means that separates light in directions 90° different from each other,
For example, a half mirror 10 and an optical filter 11 that is provided above or below (lower in the illustrated example) the light diffusing plate 5 and that has approximately the same shape and dimensions as the light diffusing plate 5 and allows light of a certain color, for example, red light to pass therethrough. and an optical filter 12 that does not allow the light that has passed through an optical filter 11 disposed in front of one image sensor 2', in this example red light, to pass through, but allows blue light to pass, for example. In this case, due to the functions of the optical filters 11 and 12 of different colors, the light diffusing plate 5 becomes a dark field for the image sensor 2'. On the other hand, the light diffusing plate 5 and the optical filter 11 provide a red bright field to the image sensor 2 in this example.
The other configurations are substantially the same as the main parts of the examples shown in FIGS. 2 and 4.
次に、第１図の例の動作を説明する。光源、即
ち照明灯４より光（白色光）の一部は、光学フイ
ルタ１１を通過することにより、単色光、この例
では赤色光となり、光拡散板５、壜底１Ａ、ハー
フミラ１０を通つてイメージセンサ２に入射す
る。この光路を通る光によつて、第４図に就いて
説明した。不透明及び半透明材より成る異物（第
１図には示せず）の検査が行われる。即ち、異物
があれば、赤色光は、それにより以後の進行が妨
害され、イメージセンサ２は、赤色の明現野の暗
い影として、この異物を検出する。尚、この時、
壜１の口を出た赤色光の一部は、ハーフミラ１０
で反射され、透明な異物の検出用のイメージセン
サ２′に向うが、その前に赤色光を通さない光学
フイルタ１２が在るので、これに吸収され、イメ
ージセンサ２′には到達しない、即ち、イメージ
センサ２′は不透明及び半透明な異物の検査には、
何等関与しない。 Next, the operation of the example shown in FIG. 1 will be explained. A part of the light (white light) from the light source, that is, the illumination lamp 4 passes through the optical filter 11 to become monochromatic light, red light in this example, and passes through the light diffusing plate 5, the bottle bottom 1A, and the half mirror 10. The light enters the image sensor 2. FIG. 4 was explained using the light passing through this optical path. An inspection is performed for foreign objects (not shown in FIG. 1) consisting of opaque and translucent materials. That is, if there is a foreign object, the red light will be obstructed from proceeding further, and the image sensor 2 will detect this foreign object as a dark shadow in the red light field. Furthermore, at this time,
A part of the red light coming out of the mouth of bottle 1 is half mirror 10.
The red light is reflected by the image sensor 2' for detecting transparent foreign objects, but since there is an optical filter 12 in front of it that does not pass red light, it is absorbed by this filter and does not reach the image sensor 2'. , the image sensor 2' is used for inspecting opaque and translucent foreign objects.
Not involved in any way.
一方、照明灯４よりの光（白色光）の一部は、
光拡散板５の外側に配置した光反射鏡７の鏡面７
Ａに向い（光路ｌ１，ｌ２参照）、そこで反射さ
れ、その反射光が壜底１Ａに、その外側斜め下方
により入射する（光路Ｌ１，Ｌ２参照）。この光
路Ｌ１，Ｌ２に沿う光は、第２及び第３図に関連
して説明したと全く同様の光路を通つて進む。従
つて、第３図に示した如き透明な異物８があれ
ば、その一部の表面８Ａで反射した光は、光軸０
−０に沿つて上方に進み、壜１の口を通過し、ハ
ーフミラ１０で反射され、この反射光が光学フイ
ルタ１２を通り、イメージセンサ２′に到る。従
つて、第２及び第３図に関連して説明した透明な
異物の検査が、イメージセンサ２′及び電子処理
機３′により行われる。即ち、イメージセンサ
２′は、暗現野の中の明るい光として透明な異物
を検出する。尚、この場合、一部の光はハーフミ
ラ１０を通り、イメージセンサ２に到るが、この
イメージセンサ２及び電子処理機３の異物検出動
作には、何等係りはないことは、明らかであろ
う。尚、この場合、光拡散板５の壜底１Ａに対向
する面を、例えば粗面となし、第３図の光路Ｌ３
に沿つてこの面に入射する光が、そこで反射され
て、壜底１Ａ再び入射するのを、できるだけ阻止
する。 On the other hand, a part of the light (white light) from illumination lamp 4 is
Mirror surface 7 of a light reflecting mirror 7 placed outside the light diffusing plate 5
A (see optical paths 11 and 12), and is reflected there, and the reflected light enters the bottle bottom 1A from the outside obliquely downward (see optical paths L1 and L2). Light along optical paths L1, L2 travels through optical paths exactly similar to those described in connection with FIGS. 2 and 3. Therefore, if there is a transparent foreign object 8 as shown in FIG.
-0, passes through the mouth of the bottle 1, is reflected by the half mirror 10, and this reflected light passes through the optical filter 12 and reaches the image sensor 2'. Therefore, the inspection for transparent foreign objects described in connection with FIGS. 2 and 3 is performed by the image sensor 2' and the electronic processor 3'. That is, the image sensor 2' detects a transparent foreign object as bright light in a dark field. In this case, some of the light passes through the half mirror 10 and reaches the image sensor 2, but it is clear that this has nothing to do with the foreign object detection operation of the image sensor 2 and the electronic processor 3. . In this case, the surface of the light diffusing plate 5 facing the bottle bottom 1A is made, for example, a rough surface, and the optical path L3 in FIG.
The light incident on this surface along the direction is reflected there and is prevented from entering the bottle bottom 1A again as much as possible.
尚、上記説明に於ては、光学フイルタ１１及び
１２の一例として、一方の光学フイルタ１１は赤
色光を通過させ、他方の光学フイルタ１２は青色
光を通過させるとしたが、各フイルタ１１，１２
の光通過特性は上記例に限定する必要はなく、光
学フイルタ１１を通過した光を、光学フイルタ１
２は通過させないものであれば、どのような光通
過特性の光学フイルタを使用してもよいことは勿
論である。 In the above description, as an example of the optical filters 11 and 12, one optical filter 11 passes red light and the other optical filter 12 passes blue light.
It is not necessary to limit the light transmission characteristics to the above example, and the light passing through the optical filter 11 is
Of course, any optical filter having any light transmission characteristic may be used as long as it does not allow the light to pass through.
更に、光学フイルタ１１，１２の代りに、互い
に異る偏光特性の偏光フイルタを用いてもよい。
即ち、光学フイルタ１１の代りに用いた偏光フイ
ルタよりの光を光学フイルタ１２の代りに用いた
偏光フイルタは通過させないような特性の偏光フ
イルタを用いてもよい。 Furthermore, instead of the optical filters 11 and 12, polarizing filters having different polarization characteristics may be used.
That is, a polarizing filter may be used that has such characteristics that it does not allow light from the polarizing filter used in place of the optical filter 11 to pass through the polarizing filter used in place of the optical filter 12.
上述の如く、本発明による壜底検査装置は、不
透明及び半透明な異物を検査する装置に、透明な
異物を検査する装置を、ハーフミラの如き光分割
手段、色フイルタ又は偏光フイルタの如き光学フ
イルタを介して、同一場所で組合せることによ
り、不透明及び半透明な異物の検出に加えて、従
来では殆んど不可能であつた透明な異物も確実に
検出できる。
As described above, the bottle bottom inspection apparatus according to the present invention includes a device for inspecting opaque and translucent foreign substances, a device for inspecting transparent foreign substances, a light splitting means such as a half mirror, an optical filter such as a color filter, or a polarizing filter. In addition to detecting opaque and translucent foreign objects, by combining them at the same location, it is possible to reliably detect transparent foreign objects, which was almost impossible in the past.
第１図は本発明による不透明、半透明及び透明
な異物を検出する装置の一実施例の略線図、第２
図は本発明による透明な異物を検出する壜底検査
装置の略線図、第３図はその一部の拡大図、第４
図は従来の壜底検査装置の一例の略線図を夫々示
す。
図に於て、１は壜、１Ａは壜底、２，２′はイ
メージセンサ、３，３′は電子処理機、４は光源、
５は光拡散板、６は遮光板、７は光反射鏡、７Ａ
は鏡面、８は透明な異物、１０は光分割手段、１
１，１２は光学フイルタを夫々示す。
FIG. 1 is a schematic diagram of an embodiment of a device for detecting opaque, translucent, and transparent foreign objects according to the present invention;
The figure is a schematic diagram of a bottle bottom inspection device for detecting transparent foreign matter according to the present invention, FIG. 3 is an enlarged view of a part thereof, and FIG.
The figures each show a schematic diagram of an example of a conventional bottle bottom inspection device. In the figure, 1 is a bottle, 1A is the bottom of the bottle, 2 and 2' are image sensors, 3 and 3' are electronic processors, 4 is a light source,
5 is a light diffusing plate, 6 is a light shielding plate, 7 is a light reflecting mirror, 7A
is a mirror surface, 8 is a transparent foreign object, 10 is a light splitting means, 1
1 and 12 indicate optical filters, respectively.
Claims (1)
置し、上記壜の壜底をその下方より光拡散板を介
して光源により照明し、上記壜底を上記壜口を通
じて上記第１のイメージセンサにより撮映し、そ
の出力を第１の電子処理機により処理して不透明
及び半透明な異物が上記壜底上に存在するか否か
を検査すると共に、第２のイメージセンサを上記
第１のイメージセンサとは異る上記壜口上の位置
に設け、その出力を処理する第２の電子処理機を
設け、上記壜底と上記光源との間に、該光源より
の光が上記壜底にその外側の下方より斜めして入
射するようになす光学手段を設け、上記壜口と上
記第１及び第２のイメージセンサとの間に上記光
源よりの壜口を通つた光を２個の別々の光に分割
する光分割手段を設け、上記光拡散板に或る光を
通過させる第１の光学フイルタを設けると共に、
上記光分割手段と上記第２のイメージセンサとの
間に上記第１の光学フイルタを通過した光の通過
を阻止する第２の光学フイルタを設け、上記第２
のイメージセンサ及び第２の電子処理機により上
記壜底上に透明な異物が在るか否かを検査するよ
うになしたことを特徴とする壜底検査装置。1. A first image sensor is arranged above the mouth of the bottle, and the bottom of the bottle is illuminated from below by a light source through a light diffusing plate, and the bottom of the bottle is exposed to the first image through the mouth of the bottle. An image is taken by the sensor, and the output is processed by a first electronic processor to inspect whether or not opaque and translucent foreign matter is present on the bottom of the bottle. A second electronic processor is provided at a position above the mouth of the bottle different from that of the image sensor and processes the output thereof, and between the bottom of the bottle and the light source, the light from the light source is directed to the bottom of the bottle. Optical means is provided to allow the light to enter the bottle at an angle from below on the outside, and the light from the light source passing through the bottle opening is separated into two separate beams between the bottle opening and the first and second image sensors. A light splitting means for splitting the light is provided, and a first optical filter for passing a certain light is provided on the light diffusing plate, and
A second optical filter for blocking the passage of light that has passed through the first optical filter is provided between the light splitting means and the second image sensor;
A bottle bottom inspection device characterized in that it inspects whether or not there is a transparent foreign substance on the bottle bottom using an image sensor and a second electronic processor.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62299418A JPH01141342A (en) | 1987-11-27 | 1987-11-27 | Bottle bottom inspection instrument |
| US07/274,929 US4943713A (en) | 1987-11-27 | 1988-11-22 | Bottle bottom inspection apparatus |
| GB8827486A GB2212911B (en) | 1987-11-27 | 1988-11-24 | Bottle bottom inspection apparatus |
| DE3839682A DE3839682A1 (en) | 1987-11-27 | 1988-11-24 | BOTTLE BOTTOM TEST DEVICE |
| FR8815455A FR2623789A1 (en) | 1987-11-27 | 1988-11-25 | DEVICE FOR MONITORING BOTTLE FUNDS |
| AU25942/88A AU609217B2 (en) | 1987-11-27 | 1988-11-28 | Bottle bottom inspection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62299418A JPH01141342A (en) | 1987-11-27 | 1987-11-27 | Bottle bottom inspection instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01141342A JPH01141342A (en) | 1989-06-02 |
| JPH0549185B2 true JPH0549185B2 (en) | 1993-07-23 |
Family
ID=17872304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62299418A Granted JPH01141342A (en) | 1987-11-27 | 1987-11-27 | Bottle bottom inspection instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01141342A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460450A (en) * | 1990-06-29 | 1992-02-26 | Hajime Sangyo Kk | Detecting apparatus of remaining liquid |
| US5969810A (en) * | 1998-05-14 | 1999-10-19 | Owens-Brockway Glass Container Inc. | Optical inspection of transparent containers using two cameras and a single light source |
| JP3668449B2 (en) * | 2001-09-28 | 2005-07-06 | 日立エンジニアリング株式会社 | Foreign matter detection device in filling liquid such as transparent containers |
| EP1241467B2 (en) | 2001-03-14 | 2010-11-03 | Hitachi Information & Control Solutions, Ltd. | Inspection device and system for inspecting foreign matters in liquid filled in transparent container |
| JP4580122B2 (en) * | 2001-05-21 | 2010-11-10 | 第一三共株式会社 | Detecting foreign matter in liquid |
| US7010863B1 (en) | 2004-01-26 | 2006-03-14 | Owens-Brockway Glass Container Inc. | Optical inspection apparatus and method for inspecting container lean |
| US20060092276A1 (en) * | 2004-10-28 | 2006-05-04 | Ariglio James A | Inspection system and method for identifying surface and body defects in a glass sheet |
| EP3255415B1 (en) * | 2015-02-04 | 2022-06-01 | Syntegon Technology K.K. | Inspection device and inspection system |
| JP2023075992A (en) * | 2021-11-22 | 2023-06-01 | 東洋ガラス株式会社 | Device for inspecting bottom portion of glass bottle |
-
1987
- 1987-11-27 JP JP62299418A patent/JPH01141342A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01141342A (en) | 1989-06-02 |
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