The definition of the spatial resolution in the photothermal radiometry (PTR) technique is given. The theoretical analysis and practical measurements show that the spatial resolution is improved as the modulation frequency is increased.
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王磊 李佩赞. PTR技术中空间分辨率的频率特性[J].红外与毫米波学报,1994,13(2):145~148]. Wang Lei, Li Peizan. FREQUENCY CHARACTERISTICS OF SPATIAL RESOLUTION IN PTR TECHNIQUE[J]. J. Infrared Millim. Waves,1994,13(2):145~148.]
