JPS5979836A - Uniform diffusion illumination apparatus - Google Patents

Uniform diffusion illumination apparatus

Info

Publication number
JPS5979836A
JPS5979836A JP19127482A JP19127482A JPS5979836A JP S5979836 A JPS5979836 A JP S5979836A JP 19127482 A JP19127482 A JP 19127482A JP 19127482 A JP19127482 A JP 19127482A JP S5979836 A JPS5979836 A JP S5979836A
Authority
JP
Japan
Prior art keywords
light emitting
emitting body
light
inner cylinder
outer cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP19127482A
Other languages
Japanese (ja)
Inventor
Toshinori Inoue
敏範 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP19127482A priority Critical patent/JPS5979836A/en
Publication of JPS5979836A publication Critical patent/JPS5979836A/en
Pending legal-status Critical Current

Links

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
    • G01N21/8806—Specially adapted optical and illumination features

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To obtain diffused light high in uniformity, by a method wherein a white translucent inner cylinder is inlaid with an outer cylinder over the entire periphery thereof so as to leave the definite interval therebetween to form a light emitting body and the predetermined number of fibers each having a uniform light amount are introduced into the upper end part of said light emitting body so as to be directed downwardly. CONSTITUTION:An outer cylinder 1 formed by such a method that thread shaped ribs are formed to the inner surface of a colorless transparent acrylic resin plate formed into a cylindrical shape at fine pitches and the thread shaped part and the entire bottom surface thereof are subjected to aluminum vapor deposition to be formed into reflection surfaces 6 and an inner cylinder 2 comprising a white translucent cylindrical acrylic resin plate are provided so as to form a light emitting body 3 in such a state that the inner cylinder 2 is internally inlaid with the outer cylinder 1 over the entire periphery thereof so as to leave the definite interval therebetween. Open ends of n-numbers of fibers 4 divided into n-numbers of sections from one light source are introduced into the upper end part of the light emitting body 3 so as to be directed downwardly in an equally distributed state. An object 5 to be inspected is placed on the central bottom part of the light emitting body 3 and a TV camera for examining the same is arranged to the upper central part of said light emitting body 3.

Description

【発明の詳細な説明】 （１）発明の目的 この発明は被検査物の凹凸の影響をなくし、被検査物の
表面の色の差のみを検出するための均一拡散照明装置を
提供せんとするものである。Detailed Description of the Invention (1) Purpose of the Invention The present invention aims to provide a uniform diffuse illumination device for eliminating the influence of unevenness of the object to be inspected and detecting only differences in color on the surface of the object to be inspected. It is something.

（２）従来例の欠点 従来均一な照明方法を得る手段として第３図の如くおわ
ん型の拡散板（１１）を被検査物（１２）にかぶせ該拡
散板（１１）内に複数の光源（１３）を被検査物（１２
）を斜め上方より照射するよう導入し、これら光源（１
３）の出す光の拡散板（１１）による乱反射拡散により
均一な光をえている。しかし、かかる従来の照明装置で
は光の均一度を出すにはおわ・ん型の拡散板（１１）を
十分に大きくする必要があり、大型化しすぎる欠点、並
びｌこ光の入射方向に叙上の如き制限が課されるという
欠点があった。(2) Disadvantages of the conventional example Conventionally, as a means of obtaining a uniform illumination method, a bowl-shaped diffuser plate (11) is placed over the object to be inspected (12) as shown in Fig. 3, and a plurality of light sources ( 13) to the object to be inspected (12
) is introduced so as to irradiate it from diagonally above, and these light sources (1
Uniform light is obtained by diffused reflection and diffusion of the light emitted by step 3) by the diffuser plate (11). However, in such conventional lighting devices, the bowl-shaped diffuser plate (11) needs to be sufficiently large in order to achieve uniformity of light. It had the disadvantage of being subject to certain restrictions.

（３）発明の構成 この発明は上記欠点を除去せんどするものであり、その
要旨とするところは下面及び略平行な突状を並ｉせる内
局面を反射面（６）に形成せる外周（１）内に白色半透
明の内筒（２）を全周にわたって一定間隔で嵌合して発
光体（３）とし、該発光体（３）の上端部にｎ個の均一
な光量のファイバー（４）を下方を向けて導入して成る
ことを特徴とする均一拡散照明装置である。(3) Structure of the Invention This invention aims to eliminate the above-mentioned drawbacks, and its gist is to form an outer periphery ( 1) A white translucent inner cylinder (2) is fitted at regular intervals over the entire circumference to form a light emitting body (3), and n fibers (with a uniform amount of light) are attached to the upper end of the light emitting body (3). 4) is introduced facing downward.

以下、この・発明を第１図及び第２図に図示せる一実施
例に基づいて説明する。This invention will be explained below based on an embodiment shown in FIGS. 1 and 2.

（１）は円筒状に形成した無色透明のアクリル板の内面
に細かいピッチでねじ切り状の突状を形成すると共に該
ねじ切り状の部分と底面全体をアルミ蒸着して反射面（
６）に形成して成る外周である。In (1), threaded protrusions are formed at a fine pitch on the inner surface of a colorless and transparent acrylic plate formed into a cylindrical shape, and the threaded portions and the entire bottom surface are vapor-deposited with aluminum to form a reflective surface (
6).

（２）は、白色半透明の円筒状アクリル板でなる内筒で
ある。(2) is an inner cylinder made of a white translucent cylindrical acrylic plate.

内筒（２）は外筒（１）に全周にわたり一定間隔を介し
て内嵌され発光体（３）を形成せる。The inner tube (2) is fitted into the outer tube (1) at regular intervals over the entire circumference to form a light emitting body (3).

（４）は−光源からｎ分割されたｎ本のファイバーで、
その開口端は発光体（３）の上端部に均等に振り分けら
れると共に下方を向けて導入されている。(4) - n fibers divided into n from the light source,
The open ends are evenly distributed over the upper end of the light emitter (3) and are introduced facing downward.

（５）は発光体（３）の中央底部に配置された被検査物
である。(5) is an object to be inspected placed at the center bottom of the light emitter (3).

被検査物（５）を観察するＴＶカメラは発光体１３）の
上部中央に配置される。A TV camera for observing the object to be inspected (5) is placed in the upper center of the light emitter 13).

（４）発明の動作状態 ｎ分割されたｎ本のファイバー（４）からの光は外筒（
１）と内筒（２）間に垂直落射光として入光する。(4) Operation state of the invention The light from the n-divided fiber (4) is
1) and the inner cylinder (2) as vertical incident light.

入光した光は外筒（１）内面に当り細かいピッチで掘ら
れたミゾ状の反射面（６）で四方八方に拡散する。The incident light hits the inner surface of the outer tube (1) and is diffused in all directions by the groove-shaped reflective surface (6) cut at a fine pitch.

拡散した光は内筒（２）の白色半透明のアクリル板でさ
らに拡散され発光体（３）の中央に出る。The diffused light is further diffused by the white translucent acrylic plate of the inner tube (2) and exits to the center of the light emitter (3).

また底部に到達した光は外筒（１）の底部の反射面（６
）で反射し、そのあと上記光と同様に発光体（３）の中
央に拡散する。In addition, the light that has reached the bottom is reflected by the reflective surface (6) at the bottom of the outer tube (1).
) and then diffuses to the center of the light emitter (3) in the same way as the above light.

このようにして発光体（３）の中央の空間部には四方八
方から拡散した光が入りその中に被検査物（５）を入れ
ることにより、被検査物（５）の凹凸の影響を無視する
ことができる均一な拡散光を照射するのである。In this way, light diffused from all directions enters the central space of the light emitter (3), and by placing the object to be inspected (5) therein, the influence of the unevenness of the object to be inspected (5) is ignored. It irradiates uniformly diffused light that can be used.

尚、発光体（３）は斜上の如き外筒（１）と内筒（２）
からなればよく、釣鐘状、わん状、円錐状にも形成され
る。In addition, the light emitting body (3) has an outer cylinder (1) and an inner cylinder (2) as shown diagonally above.
It can be formed into a bell shape, a bowl shape, or a cone shape.

（５）発明の効果 斜上の如くこの発明による均一拡散照明装置によれば、
ｎ個のファイバー（４）による光源を発光体（３）の全
周から供給すると共にこの光を下面及び略平行な突状を
並設せる外筒（１）の内周面でなる反射面（６）により
十分に拡散してのち、発光体（３）の内周面全体から拡
散光が照射されることにより該発光体（３）の中央部に
おいては均一度の高い拡散光が照射されるのである。ま
たこのような拡散光は内筒（２）と外筒（１）間で形成
されるために装置自体を小型なものとしうるのである。(5) Effects of the invention According to the uniformly diffused illumination device according to the present invention, as shown in FIG.
A light source of n fibers (4) is supplied from the entire circumference of the light emitter (3), and this light is reflected by a reflecting surface (made of the lower surface and the inner circumferential surface of the outer cylinder (1) in which substantially parallel protrusions are arranged side by side). After being sufficiently diffused by step 6), the diffused light is irradiated from the entire inner peripheral surface of the light emitter (3), so that the central part of the light emitter (3) is irradiated with highly uniform diffused light. It is. Furthermore, since such diffused light is formed between the inner tube (2) and the outer tube (1), the device itself can be made smaller.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図はこの発明の一実施例を示す図で、第
１図は斜視図、第２図は断面図　第３図は従来例を示す
断面図である。 特許出願人 松下電工株式会社 代理人弁理士　　竹　元　敏　丸 （ほか２名′） 第１図 第２１ 第３図1 and 2 are views showing an embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a sectional view, and FIG. 3 is a sectional view showing a conventional example. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) Figure 1 Figure 21 Figure 3

Claims (1)

【特許請求の範囲】[Claims] （１）下面及び略平行な突状を並設せる内周面を反射面
（６）に形成せる外筒（１）内に白色半透明の内筒（２
）を全周にわたって一定間隔で嵌合して発光体（３）と
し、該発光体（３）の上端部にｎ個の均一な光量のファ
イバー（４）を下方を向けて導入して成ることを特徴と
する均一拡散照明装置。(1) A white translucent inner cylinder (2
) are fitted at regular intervals over the entire circumference to form a light emitter (3), and n fibers (4) with a uniform amount of light are introduced into the upper end of the light emitter (3) facing downward. A uniformly diffused lighting device featuring:
JP19127482A 1982-10-29 1982-10-29 Uniform diffusion illumination apparatus Pending JPS5979836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19127482A JPS5979836A (en) 1982-10-29 1982-10-29 Uniform diffusion illumination apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19127482A JPS5979836A (en) 1982-10-29 1982-10-29 Uniform diffusion illumination apparatus

Publications (1)

Publication Number Publication Date
JPS5979836A true JPS5979836A (en) 1984-05-09

Family

ID=16271818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19127482A Pending JPS5979836A (en) 1982-10-29 1982-10-29 Uniform diffusion illumination apparatus

Country Status (1)

Country Link
JP (1) JPS5979836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05245113A (en) * 1992-03-02 1993-09-24 Kao Corp Skin surface observing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05245113A (en) * 1992-03-02 1993-09-24 Kao Corp Skin surface observing device

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