JPH0521064Y2 - - Google Patents

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Publication number
JPH0521064Y2
JPH0521064Y2 JP1987106194U JP10619487U JPH0521064Y2 JP H0521064 Y2 JPH0521064 Y2 JP H0521064Y2 JP 1987106194 U JP1987106194 U JP 1987106194U JP 10619487 U JP10619487 U JP 10619487U JP H0521064 Y2 JPH0521064 Y2 JP H0521064Y2
Authority
JP
Japan
Prior art keywords
ring
television camera
illumination device
light
close
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
Application number
JP1987106194U
Other languages
Japanese (ja)
Other versions
JPS6410729U (en
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 filed Critical
Priority to JP1987106194U priority Critical patent/JPH0521064Y2/ja
Publication of JPS6410729U publication Critical patent/JPS6410729U/ja
Application granted granted Critical
Publication of JPH0521064Y2 publication Critical patent/JPH0521064Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 イ 考案の目的 〔産業上の利用分野〕 本考案は照明装置が装着される近接撮影用のテ
レビカメラに関し、詳しくはテレビカメラの前面
近傍の被写界を高照度にかつ均一に照明すること
のできる照明装置を一体とした近接撮影用テレビ
カメラを得ることを目的とするものである。
[Detailed explanation of the invention] A. Purpose of the invention [Field of industrial application] The invention relates to a television camera for close-up photography that is equipped with a lighting device. The object of the present invention is to provide a television camera for close-up photography that is integrated with an illumination device that can provide uniform illumination.

〔従来の技術〕[Conventional technology]

近接撮影においては高照度の照明が必要とされ
るため高光度の照明光を適宜の光学系により集光
して被写界を照明していた。
In close-up photography, high-intensity illumination is required, so the high-intensity illumination light is focused by an appropriate optical system to illuminate the field.

〔考案が解決しようとする問題点〕[Problem that the invention attempts to solve]

従来の近接撮影用テレビカメラの照明装置にお
いては、次のような問題点がある。
Conventional illumination devices for close-up television cameras have the following problems.

すなわち、近接撮影の被写界は小さく、したが
つて従来の比較的に寸法の大きな照明装置によつ
ては方向によつて照度に差異のない照明を得るこ
とができず、むらのない影像を得ることが困難で
あつた。
In other words, the field of view for close-up photography is small, and therefore it is not possible to obtain illumination with uniform illuminance depending on the direction using conventional relatively large illumination devices, making it difficult to obtain uniform images. It was difficult to obtain.

ロ 考案の構成 〔問題点を解決するための手段〕 本考案の近接撮影用テレビカメラは、多数の光
フアイバーを導光部材としてそれぞれの射出端を
円筒状に配置したリング照明装置をテレビカメラ
と一体としたものであつて、該照明装置の円周射
出端から均一に射出される拡散光を近接前方に連
設されるリング状レンズによつて集光して略円筒
状の平行光束とし、該光束をリング状レンズの支
持枠内面及び対物レンズ筐体外側で反射して、被
写界を照明するものであり、全周方向から高照度
の照明を均一にすることができるので、上記の問
題点を解決することができる。
B. Structure of the invention [Means for solving the problems] The close-up television camera of the present invention uses a ring illumination device in which a large number of optical fibers are used as light guide members and the emission ends of each are arranged in a cylindrical shape. integrated, the diffused light uniformly emitted from the circumferential emission end of the illumination device is condensed by a ring-shaped lens disposed adjacently in front to form a substantially cylindrical parallel light beam; The light flux is reflected on the inner surface of the support frame of the ring-shaped lens and the outer side of the objective lens housing to illuminate the object field, and it is possible to uniformly illuminate the object with high illuminance from all directions. Problems can be resolved.

〔作用〕[Effect]

単一の光フアイバーから射出される光はその射
出端を頂点とした頂角50〜60°の円錐形に拡散さ
れるものであり、この射出端の前方に、その後方
主点から半径程度離れた位置に球形レンズを置く
と、略平行な光束が得られる。この原理を応用
し、多数の光フアイバーをその端部が円ををなす
よに形成したリング照明から射出される光を前方
に置かれたリング状レンズによつて、直径方向に
拡散する成分を略平行に集光して、円周全体とし
ては、円柱面状の光束を得ることができるもので
ある。
The light emitted from a single optical fiber is diffused into a conical shape with an apex angle of 50 to 60° with the exit end as the apex, and a cone with an apex angle of 50 to 60° is placed in front of the exit end, approximately radially away from the rear principal point. If a spherical lens is placed at the same position, a substantially parallel beam of light can be obtained. Applying this principle, a ring-shaped lens placed in front of a ring-shaped lens placed in front of the light emitted from a ring illumination consisting of a large number of optical fibers with their ends forming a circle can be used to diffuse components in the diametrical direction. By condensing light substantially in parallel, it is possible to obtain a cylindrical light beam over the entire circumference.

本考案者はこのリング照明装置により高照度の
照明が得られる近接撮影用テレビカメラを得たも
のであり、リング照明装置の円形の射出端の前方
に射出端円の直径と略同じ大きさの径を有する直
径断面が略円となるリング状レンズをそれぞれの
中心軸が重なるよう同軸に連設して、リング照明
装置からの拡散光を可及的に平行光線からなる円
柱状の光束とし、さらに該光束をリング状レンズ
を固定する支持枠の下部内面の逆円錐状面及び対
物レンズ筐体の逆円錐状外側面で反射せしめて、
該照明装置と一体に形成されたテレビカメラの被
写界への照明光とするものである。
The present inventor has obtained a close-up television camera that can obtain high-intensity illumination using this ring lighting device, and in front of the circular exit end of the ring lighting device, a diameter of approximately the same size as the diameter of the exit end circle is installed. Ring-shaped lenses each having a diameter with a substantially circular cross-section are arranged coaxially so that their central axes overlap, and the diffused light from the ring illumination device is made into a cylindrical light beam consisting of parallel light rays as much as possible, Further, the light flux is reflected by the inverted conical surface of the lower inner surface of the support frame that fixes the ring-shaped lens and the inverted conical outer surface of the objective lens housing,
The illumination light is used to illuminate the field of a television camera formed integrally with the illumination device.

第3図はリング状レンズにより集光される様子
を模式的に説明する斜視図であり、リング照明装
置1の射出端円の直径Rと略同一直径rのリング
状レンズ2によりイに示す円柱面状の光束とされ
るものである。
FIG. 3 is a perspective view schematically illustrating how light is focused by a ring-shaped lens. It is considered to be a planar light beam.

なお、gは端部が円周となるように軸Oと同一
方向に多数配設される単一の光フアイバーであ
り、図示されない光フアイバーgが集束された他
端から同じく図示されない光源となる例えばハロ
ゲンランプの赤外成分がフイルターによつて除去
された光が導入されてリング照明装置1となるも
のである。
Note that g is a single optical fiber that is arranged in large numbers in the same direction as the axis O so that the ends thereof are circumferential, and the optical fiber g (not shown) is converged from the other end and serves as a light source (also not shown). For example, the ring illumination device 1 is obtained by introducing light from a halogen lamp whose infrared component is removed by a filter.

〈実施例〕 第1図および第2図は本考案をペン型の小形テ
レビカメラとした実施例を示す要部の拡大側断面
図および実際に使用される様子を示す斜視図であ
る。
Embodiment FIGS. 1 and 2 are an enlarged side sectional view of a main part of an embodiment of the present invention as a small pen-shaped television camera, and a perspective view showing how it is actually used.

1はテレビカメラCの円柱状の本体筒の外周に
全長にわたつて装着されたリング照明装置であ
り、上端から光フアイバーgが集束された光フア
イバー束Gが導出されて図示されない光源に連結
されている。
Reference numeral 1 denotes a ring illumination device attached to the entire length of the cylindrical main body tube of the television camera C, and an optical fiber bundle G in which optical fibers G are focused is led out from the upper end and connected to a light source (not shown). ing.

光フアイバーgはリング照明装置1の下端に向
かつて延びその下端がカメラCの光軸と同軸の円
周状をなすようにかつ光フアイバーgの向きが該
光軸と同一方向となるように挟持配設されて円形
の光射出端とされるものである。
The optical fiber g extends toward the lower end of the ring illumination device 1, and is held in such a way that the lower end forms a circumference coaxial with the optical axis of the camera C, and the optical fiber g is oriented in the same direction as the optical axis. It is arranged to form a circular light exit end.

リング状レンズ2は前記リング照明装置1の射
出端前面近傍位置に連設されるものであり、その
形状は円形をなし、その直径断面は円である。
The ring-shaped lens 2 is arranged in succession near the front surface of the exit end of the ring illumination device 1, and has a circular shape and a circular cross-section.

該リング状レンズ2は、断面円の中心を結んで
できる円の直径rが射出端円の直径Rと等しく、
また断面円の半径の2/3の距離を射出端円から離
して連設されているので、リング照明装置1から
射出された光はリング状レンズ2を通過して円柱
面状に集光される。
In the ring-shaped lens 2, the diameter r of the circle formed by connecting the centers of the cross-sectional circles is equal to the diameter R of the exit end circle,
In addition, since the ring illumination device 1 is arranged in series at a distance of 2/3 of the radius of the cross-sectional circle from the exit end circle, the light emitted from the ring illumination device 1 passes through the ring-shaped lens 2 and is condensed into a cylindrical surface. Ru.

リング状レンズ2の前方には、下部内面が光軸
方向に45°の角度を成す円錐形状の鏡面を有して
リング状レンズ2をリング照明装置に対して固定
する支持枠Fがリング照明装置1の下端に螺着さ
れて設けられており、前記集光された光は該鏡面
において反射されて水平方向に反射変向され、さ
らに、カメラCの対物レンズ系Lを収容する筐体
の、前記支持枠F内面の角度(45°)に応じた角
度として光軸に対して55°の角度を有するよう形
成された光反射性の逆円錐形外側面において該反
射光はふたたび反射されて、小円で示される被写
界部分に到達して、該部分を光軸から20°の角度
をなす全周方向から均一にかつ高照度に照明する
ことができるものである。
In front of the ring-shaped lens 2, there is a support frame F that has a conical mirror surface whose lower inner surface forms an angle of 45° in the optical axis direction and fixes the ring-shaped lens 2 to the ring lighting device. 1, the focused light is reflected on the mirror surface and reflected and deflected in the horizontal direction, and the housing accommodates the objective lens system L of the camera C. The reflected light is reflected again at the light-reflective inverted conical outer surface formed to have an angle of 55° with respect to the optical axis as an angle corresponding to the angle (45°) of the inner surface of the support frame F, It is possible to reach the part of the field indicated by the small circle and illuminate that part uniformly and with high illuminance from the entire circumferential direction forming an angle of 20 degrees from the optical axis.

光フアイバーgから拡散射出される光の主要成
分の光路を第1図の一点鎖線で示す。
The optical path of the main components of the light diffused and emitted from the optical fiber g is shown by the dashed-dotted line in FIG.

Sは支持枠Fの側面に螺着されたスペーサーで
あり、その下端面は被写界と同じ距離位置とさ
れ、第2図の使用状態の斜視図に示すように被写
体に端面を直接押付けることによつて焦点の合つ
た撮影が簡単に可能となるものである。
S is a spacer screwed onto the side of the support frame F, and its lower end surface is positioned at the same distance as the subject, and the end surface is directly pressed against the subject as shown in the perspective view of the used state in Figure 2. This makes it easy to take photographs in focus.

テレビカメラCの内部には電荷結合素子が組込
まれており、ケーブルWによつて適宜のテレビモ
ニターに連結されてその撮影像を写しだすもので
ある。
A charge-coupled device is incorporated inside the television camera C, and is connected to a suitable television monitor via a cable W to display a captured image.

なお、具体例は示さないが、反射面の角度や組
合せなどの簡単な設計変更によつて、その照明方
向(実施例においては光軸に対して20°)を様々
に変向することができる。
Although specific examples are not shown, the illumination direction (in the example, 20° with respect to the optical axis) can be varied by simple design changes such as the angle and combination of the reflecting surfaces. .

ハ 考案の効果 以上説明したように、本案近接撮影用テレビカ
メラは均一で高照度の照明をすることができる照
明装置を一体にしたものであり、むらの無い高い
画質の撮影が簡単に可能となるものである。
C. Effect of the invention As explained above, the close-up television camera of the present invention is an integrated lighting device that can provide uniform and high-intensity illumination, making it possible to easily take pictures with high image quality without unevenness. It is what it is.

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

第1図は本考案テレビカメラの実施例の要部を
示す拡大側断面図、第2図はその使用状態を示す
斜視図、第3図はリング状レンズによる集光の様
子を模式的に示す斜視図である。 1……リング照明装置、2……リング状レン
ズ、g……光フアイバー、G……光フアイバー
束、C……テレビカメラ、F……支持枠、S……
スペーサー。
Fig. 1 is an enlarged side sectional view showing the main parts of the embodiment of the television camera of the present invention, Fig. 2 is a perspective view showing its usage, and Fig. 3 schematically shows how light is collected by a ring-shaped lens. FIG. DESCRIPTION OF SYMBOLS 1... Ring illumination device, 2... Ring-shaped lens, g... Optical fiber, G... Optical fiber bundle, C... Television camera, F... Support frame, S...
spacer.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 近接撮影用テレビカメラにおいて、テレビカメ
ラCの外周側に光軸と同軸にリング照明装置を装
着し、該照明装置の前面に近接して照明光射出端
がなす円周の直径と略同じ径を有する直径断面が
略円形のリング状レンズを下部内面が逆円錐状の
光反射面とされる支持枠Fにより同軸に連設し、
一方、テレビカメラCの対物レンズLの筐体外側
面が支持枠F内面の逆円錐形状に応じた逆円錐状
の光反射面とされることを特徴とする照明装置付
き近接撮影用テレビカメラ。
In a television camera for close-up photography, a ring illumination device is attached to the outer peripheral side of the television camera C coaxially with the optical axis, and a ring illumination device is installed close to the front of the illumination device with a diameter that is approximately the same as the diameter of the circumference formed by the illumination light exit end. A ring-shaped lens having a substantially circular diameter cross section is coaxially arranged by a support frame F whose lower inner surface is an inverted conical light reflecting surface,
On the other hand, a close-up television camera with an illumination device is characterized in that the outer surface of the housing of the objective lens L of the television camera C is an inverted conical light reflecting surface corresponding to the inverted conical shape of the inner surface of the support frame F.
JP1987106194U 1987-07-10 1987-07-10 Expired - Lifetime JPH0521064Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987106194U JPH0521064Y2 (en) 1987-07-10 1987-07-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987106194U JPH0521064Y2 (en) 1987-07-10 1987-07-10

Publications (2)

Publication Number Publication Date
JPS6410729U JPS6410729U (en) 1989-01-20
JPH0521064Y2 true JPH0521064Y2 (en) 1993-05-31

Family

ID=31339487

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987106194U Expired - Lifetime JPH0521064Y2 (en) 1987-07-10 1987-07-10

Country Status (1)

Country Link
JP (1) JPH0521064Y2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2536060Y2 (en) * 1990-11-27 1997-05-21 株式会社 キーエンス Fiber illumination type imaging device
JP2002507779A (en) * 1998-03-20 2002-03-12 オート・イメージ・アイデイ・インコーポレーテツド Target lighting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240149A (en) * 1975-09-20 1977-03-28 Leitz Ernst Gmbh Downward illumination device for bright field and dark field illumination
JPS59214427A (en) * 1983-05-23 1984-12-04 キヤノン株式会社 Cornea shape measuring apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287240U (en) * 1975-12-25 1977-06-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240149A (en) * 1975-09-20 1977-03-28 Leitz Ernst Gmbh Downward illumination device for bright field and dark field illumination
JPS59214427A (en) * 1983-05-23 1984-12-04 キヤノン株式会社 Cornea shape measuring apparatus

Also Published As

Publication number Publication date
JPS6410729U (en) 1989-01-20

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