顕微鏡カメラを使用している、またはこれから使用したいと考えている研究者の方
カメラのスペックと実験との関連性について説明します。
浜松ホトニクスの表記 | 他メーカーの表記 |
---|---|
撮像素子 | Sensor options, Sensor type |
顕微鏡カメラのセンサにはCCD、EM-CCD、CMOSの3種類があります。EM-CCDはCCDを改良して信号を増幅させる機構が追加されたセンサですが、CMOSセンサは全く別の技術であり、独自の機能、強み、弱みがあります。センサごとに性能に違いがあるため、CMOSカメラとCCDカメラ、EM-CCDカメラを比較する際には注意が必要です。
センサアーキテクチャの違いについてはsCMOS vs. CCD vs. EM-CCDを、科学計測用CMOS技術についてはChanging the Gameホワイトペーパーをご覧ください。
センサそのものの性能だけでなく、メーカーがカメラにセンサを実装する方法もカメラの性能に影響します。同じセンサを用いているカメラでも、スピード、読み出しノイズ、暗電流、アナログゲイン、ビニング、飽和電荷量など様々な性能が、メーカーのカメラの設計方法によって異なることがあります。このように、カメラ評価においてセンサの型名がそのままカメラの性能を表すわけではありません。
では、研究者にとってセンサの違いは何を意味するのでしょうか? 最も重要なことは実験に必要な性能と品質です。そのカメラは現在の実験に必要な解像度、速度、感度を持っているのか、今後の実験に役立つ高度な機能を持っているのか。これらの質問に正確に回答するためには、すべてのカメラの仕様を詳しく見て、お客様の実験に対してセンサがどのように機能するかを確認する必要があります。お客様の実験の詳細をすべて知ることはできませんが、センサ技術については、いくつかの一般的な見解があります。
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