scholarly journals High-resolution 3D imaging method using chirped optical frequency combs based on convolution analysis of the spectral interference fringe

OSA Continuum ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 20 ◽  
Author(s):  
Takashi Kato ◽  
Megumi Uchida ◽  
Yurina Tanaka ◽  
Kaoru Minoshima
Keyword(s):  
High Resolution ◽  
Interference Fringe ◽  
3D Imaging ◽  
Spectral Interference ◽  
Imaging Method ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
Frequency Combs

Development of a Non-Contact Precision Measurement Technique Using Optical Frequency Combs

2012 ◽  
Vol 523-524 ◽  
pp. 877-882 ◽  
Author(s):  
Taro Onoe ◽  
Satoru Takahashi ◽  
Kiyoshi Takamasu ◽  
Hirokazu Matsumoto
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
High Sensitivity ◽  
Distance Measurement ◽  
New Method ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
High Frequencies ◽  
Frequency Combs ◽  
Lock In

We develop a new method for high-resolution and contactless distance measurement based on self frequency beats of optical frequency combs. We use two optical frequency comb lasers with Rb-stabilized repetition frequencies for doing accurate distance measurement. The repetition frequencies of the optical frequency combs are different, thus parts of the high frequencies such as several gigahertz of self beats are beat-downed to several megahertz without an RF frequency oscillator. The phases of the beat signals of several megahertz frequencies are measured by a lock-in amplifier with a high resolution and high sensitivity. The new method is applied to distance measurement for objects which have rough-surface in the distance range of several-meters.

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