CHEN Long-cong, GAO Bin, GAN Ping. Study on novel sensor for getting fingerprint image with holographic grating[J]. 2007, (2): 92-93+96. DOI: 10.13873/j.1000-97872007.02.031.
A novel fingerprint sensor is introduced based on many experimentation and technology of holographic grating
It is composed of homogeneous light source
holographic grating
lens and CCD.The holographic grating
which is made by technology of laser holography
is key component in this sensor.The disadvantage of fingerprint sensors
which utilizing total reflection prism and holographic prism to get image of fingerprint is solved.The highly clear and real fingerprint image may be get by using this sensor
It is so good that the pores on the ridges can be seen clearly.A example of the novel sensor are given.