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光子计数头
H16721-50
H16721 系列是一款光子计数头设备，包含一个金属封装光电倍增管（具有 GaAsP/GaAs 光阴极面）和一个电子制冷器。热电制冷器可减少光阴极面产生的热噪声，从而提供高量子效率，即使在极低光照水平下也能以良好的信噪比进行测量。H16721-50 在 380 nm 至 900 nm 的宽光谱范围内具有灵敏度。通过监测安装在光电倍增管附近的热敏电阻输出，然后调节热电制冷器的电流，即可确保光电倍增管保持在恒定温度。
详细参数
| 光阴极面区域形状 | 圆形 |
|---|---|
| 光阴极面区域尺寸 | 5 mm 直径 |
| 波长（短） | 380 nm |
| 波长（长） | 900 nm |
| 波长（峰值） | 730 nm |
| 尺寸 (W x H x D) | 56 mm x 36 mm x 104 mm |
| 输入电压 | +4.5 V 至 +5.5 V |
| 最大值 输入电压 | +6 V |
| 最大值 输入电流 | 50 mA |
| 500 nm 处的计数灵敏度典型值 | 2.6 x 105 s-1・pW-1 |
| 600 nm 处的计数灵敏度典型值 | 4.5 x 105 s-1・pW-1 |
| 700 nm 处的计数灵敏度典型值 | 5.1 x 105 s-1・pW-1 |
| 800 nm 处的计数灵敏度典型值 | 4.8 x 105 s-1・pW-1 |
| 计数线性度 | 1.5 x 106 s-1 |
| 暗计数典型值 | 125 s-1 |
| 暗计数最大值 | 375 s-1 |
| 脉冲对分辨率 | 70 ns |
| 输出脉冲宽度 | 30 ns |
| 输出脉冲高度最小值 | 3 V |
| 输出脉冲高度典型值 | 3.6 V |
| 建议的负载电阻 | 50 Ω |
| 信号输出逻辑 | 正逻辑 |
| 工作环境温度 | +5°C 至 +35°C |
| 储存温度 | -20°C 至 +50°C |
| 重量 | 395 g |
外形尺寸图（单位：mm）
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