Measurement of surface temperature of human body skin is one of the basic and standard diagnostic tool for health management. The temperature of the human body is a vital sign of health status and it is used for medical diagnosis. Generally, contact type temperature sensors are used for temperature monitoring; however, accuracy of these sensors is limited due to the skin-sensor interface, sensor physical dimensions, and sensor pressure. This paper demonstrates an application of digital holography to measure the temperature of human hand skin (index finger and palm skin). The heat energy emitted from the human body flows as convection current in the air and cause a change in refractive index in air field around human body which leads to change in phase of object wave. A volume phase holographic optical element based digital holographic interferometric (DHI) system has been used in a lensless Fourier transform (LLFT) configuration to measure the temperature of human skin from the reconstructed phase difference of air surrounding the human body and ambient air. The surface temperature of human skin measured by volume phase holographic optical element based DHI system shows a good agreement with the temperature measured by a commercially available digital and infrared thermometer.

人体皮肤表面温度的测量是健康管理的基本和标准诊断工具之一。人体的温度是健康状况的重要标志，用于医学诊断。一般采用接触式温度传感器进行温度监测；然而，这些传感器的精度受到皮肤传感器接口、传感器物理尺寸和传感器压力的限制。本文展示了数字全息技术在测量人手皮肤（食指和手掌皮肤）温度方面的应用。人体发出的热能在空气中以对流形式流动，使人体周围空气场的折射率发生变化，从而导致物体波的相位发生变化。基于体积相位全息光学元件的数字全息干涉 (DHI) 系统已用于无透镜傅里叶变换 (LLFT) 配置，以根据人体周围空气和环境空气的重建相位差来测量人体皮肤的温度。基于体积相位全息光学元件的 DHI 系统测量的人体皮肤表面温度与市售数字和红外温度计测量的温度非常吻合。