CYLINDER INNER SURFACE IMAGING DEVICE

• Main Author: IDA MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 15.04.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING

To obtain reflected light of appropriate brightness from an area to be imaged on an inner surface of a cylinder.SOLUTION: A cylinder inner surface imaging device 10 has a conical cone mirror 15 with an apex angle of 90° so that an apex faces upward at the center of a bottom plate 14 provided at the tip of a light guide pipe portion 12 extended from an imaging device main body 11 via a transparent cylinder portion 13. The transparent cylinder portion 13 is formed of a tapered and transparent tube whose diameter is changed in the height direction over the entire circumference, with a height range of the conical cone mirror not shielded in either the inside or outside direction. On the upper part of the light guide pipe portion 12, provided are: a beam splitter 17 which reflects light made incident from the direction orthogonal to the central axis to the direction parallel to the central axis in which the conical cone mirror 15 is installed, and transmits light made incident from a direction parallel to the central axis to the direction in which the imaging device main body 11 is installed; and a light source 18 that emits light toward the beam splitter 17 from a direction orthogonal to the central axis of the light guide pipe portion 12.SELECTED DRAWING: Figure 1 【課題】円筒内面の撮像すべき範囲から適切な明るさの反射光を得る。【解決手段】円筒内面撮像装置１０は、撮像装置本体１１から伸ばされた導光筒部１２の先端に透明筒部１３を介して備えた底板１４の中心に頂点を上に向ける様にして頂角９０°の円錐コーンミラー１５を備えている。透明筒部１３は、高さ方向に直径を変化させた先細で全周にわたり透明テーパ筒で構成され、円錐コーンミラーの高さの範囲については内外いずれの方向も遮蔽されることなく設置されている。導光筒部１２の上部には、中心軸に直交する方向から入射する光を中心軸と平行で円錐コーンミラー１５の設置された方向へ反射すると共に、中心軸に平行な方向から入射する光を撮像装置本体１１の設置された方向へと透過させるビームスプリッター１７と、ビームスプリッター１７に向かって導光筒部１２の中心軸と直交する方向から光を照射する光源１８とを備えている。【選択図】 図１