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医療

信頼性および精密性

 CHRocodile シリーズの光学レンズセンサーによって、医療用コンポーネントの非接触で高精度な間隔および厚み測定が可能となります。 例えば、医療用カテーテルバルーンの正確な厚みは、治療成功の最重要な要素となります。 またメガネレンズやコンタクトレンズにおいても加工時の最高精密度が重要な鍵となります。 CHRocodileセンサーはガラスの厚みならびにメガネレンズ上の損傷保護層の厚みを測定します。 包装分野では、弊社の精密な測定技術によりフィルム、ブリスター、モールドそしてヴィオラへの品質の高い要求への対処が監視されます。 弊社センサーの精度は、さらに多くの他の医療用途、例えば人工股関節や膝関節あるいはステントの高精密測定において実証されています。

用途
バルーンの壁厚測定

心臓学における心臓血管の狭窄個所拡張用に投入されるバルーンは、その壁厚に関して最も高い要求を満たしていなければなりません。 その厳正な測定にはセンサー CHRocodile Eが最適です。 このセンサーは無接触で確実にマント部および円錐部の高品質な測定データを提供します。
この測定ヘッドの高い測定率、最高3つまでのエンコーダ信号処理機能、そしてコンパクトな構造は、ラボならびに生産ラインへの投入、さらに検査機への組み込みが可能なセンサーとして提供されています。

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CHRocodile M4
医療用包装材の壁厚測定

医療薬品用瓶、シリンジ、またはブリスター包装等の医療包装材は、高い要求性に対応するものでなければなりません。 往々にして使用されている材料の壁厚は重要な品質の判断基準となります。 これらを簡単、迅速に、そして精密に測定するためには、色彩共焦センサー CHRocodile M4が最適です。 このセンサーは、例えばこげ茶色のガラス瓶等の色が施された包装材も、確実で正確に壁厚を測定します。 最新設計により、センサーは迅速かつ簡単に既存の生産環境に組み込めるのが長所ですが、ラボでのオフライン測定もその長所に数えられます。

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CHRocodile LR
Measuring the wall thickness of glass flasks with low wall thicknesses

Glass capillaries are thin glass tubes with an internal diameter of approx. 0.1 - 1 mm. Because of the low internal diameter, capillary forces are created which cause liquids, such as blood for example, to be sucked up. Injection flasks are small glass flasks with a capacity of a few milliliters. They are closed by an injection plug or a penetrable membrane.

The wall thickness of these thin tubes or glass flasks can be measured very accurately and, most importantly very quickly, with contact-free optical measuring methods that make it possible for them to be used in inline measuring systems.

Here Precitec Optronic interferometric sensors are often used. The wall thickness can be measured within a few microns. The lateral resolution is in a single figure μ range. Topographies can be determined very quickly with a line sensor like the CHRocodile CLS which enables the depth and width of cracks in the glass surface to be measured, for example.

CHRocodile S / SE
Measuring liquid layers and liquid levels

In medical engineering, the oil thickness on hoses of injection needles or venous catheters is important. The thickness of the oil layer can thus be determined using contact-free optical measuring systems. This layer thickness can be determined within a few microns. Should the objects not be evenly moistened, the places with or without oil can be detected. This technique has also been proven when pipetting microtiters. If these are filled automatically, a confocal sensor can measure the distance between the sensor and the liquid surface in another also automated step. The fill quantities for larger runs can be very quickly calculated from this measurement. 

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CHRocodile S / SE
Contact-free 3D measuring systems for endoprostheses

The complex, multi-curved geometries of endoprostheses have tolerances between a few microns up to several hundred microns. Their highly reflective surfaces pose considerable problems for optical measuring systems. The surfaces of the material pairs must be produced in the required quality. Here ultra high molecular polyethylene and metals or ceramic on the other side are used. If parts with these sizes are to be measured in 3D, you need sensors that can record the very different surfaces without losing accuracy. The high apertures of chromatic confocal optical probes ensure that sufficient light from the highly reflective free form surfaces reaches the sensor. Retrieval analysis is an important area of activity as well as quality assurance in production. These analyses are mainly used to understand why wear occurs. Using prostheses that have recently failed in use and have not reached their estimated service life, they try to find the causes.

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CHRocodile IT 150 -15000
Wall thickness of hoses for medical applications, coatings

The wall thickness of transparent hoses for medical applications can be measured well with interferometric measuring methods. It depends on the individual case whether the thickness of individual layers of multi-layer hoses can also be measured. This may depend on the difference in the refractive indices of the individual materials. If the refractive indices of the materials differ sufficiently from each other several individual layer thicknesses can be measured. The thickness can also be determined for materials which are not transparent to white light– e.g. coloured hoses. In this case measurements are taken with infrared light. In the field of medicine, the thickness of ventricular pump membranes is also measured with chromatic confocal sensors. Optical contact-free measuring systems are also used for measuring the wall thickness of balloons which are used in angioplasty. Up till now, wall thicknesses have been measured mechanically using a micrometer through two wall thicknesses and then the result halved. These procedures are, therefore, only accurate within certain limits. Stent coatings can be measured interferometrically.

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