Abstract:A compound eye and retina-like combination sensor based on a space-variant curved micro lens array (CMLA) is proposed to simultaneously offer the large FOV characteristic of a compound eye and retina-like feature of a single aperture eye. The mathematical models of the sensor are developed and the structure parameters of the space-variant CMLA are deduced. Modeling verification is carried out and the results show that the whole field of view (FOV) of the sensor is 105° and the optical information loss rate is … Show more
“…Figure 3 shows the geometrical model of the receiving system. Different from our previous model 30 , the space-variant resolution, i.e., the retina-like property of the human eye in the proposed method is that the distance between the main optical axis and the central point distribution of the sampling area for these microlenses meets a geometric sequence growth. Figure 3 Geometrical model of the receiving system.…”
Section: Methodsmentioning
confidence: 88%
“…Each ommatidium only transfers a small part of the FOV and the final FOV is the cumulation result of all ommatidium. On the other hand, one unique merit of the human eye is the space-variant resolution property, i.e., high resolution in the center of the FOV and low resolution in the peripheral of the FOV 30 , 31 . Benefiting from this property, it can compress image information in the periphery of the FOV, i.e., the uninterested area meanwhile maintains the image information in the central of the FOV, i.e., the interested area clear 32 , 33 .…”
Section: Introductionmentioning
confidence: 99%
“…However, the hybrid of the compound and human eyes has not yet been studied. Inspired by bionic technology, our group previously proposed an imaging system combining of these two eyes, but it is a passive imaging system and belongs to two-dimensional planar imaging 30 , 42 . Unlike our previous studies, we study a pulsed-laser 3D imaging method combined the large FOV feature of the compound eye and the space-variant resolution property of the human eye simultaneously.…”
A pulsed-laser three-dimensional imaging system inspired by compound and human hybrid eye is proposed. A diffractive optical element is used to enlarge field of view (FOV) of transmitting system and a receiving system consisting of a non-uniform microlens array, an aperture array, and an avalanche photodiode array is designed. The non-uniform microlens array is arranged on a curved surface to mimic large FOV feature of the compound eye. Meanwhile, the non-uniform microlens array is modeled to mimic space-variant resolution property of the human eye. On the basis of the proposed system, some simulation experiments are carried out. Results show that the entire FOV is up to 52°, and the resolution is 30 × 18. The proposed system has a high resolution in the center FOV and a low resolution in the peripheral FOV. The rotation and scaling invariances of the human eye are verified on the proposed system. The signal-to-noise ratio (SNR) increases with the increase in the number of rings and the maximum SNR locates at the outmost periphery area. This work is beneficial to the design of the pulsed laser three-dimensional imaging system with large FOV, high speed, and high resolution.
“…Figure 3 shows the geometrical model of the receiving system. Different from our previous model 30 , the space-variant resolution, i.e., the retina-like property of the human eye in the proposed method is that the distance between the main optical axis and the central point distribution of the sampling area for these microlenses meets a geometric sequence growth. Figure 3 Geometrical model of the receiving system.…”
Section: Methodsmentioning
confidence: 88%
“…Each ommatidium only transfers a small part of the FOV and the final FOV is the cumulation result of all ommatidium. On the other hand, one unique merit of the human eye is the space-variant resolution property, i.e., high resolution in the center of the FOV and low resolution in the peripheral of the FOV 30 , 31 . Benefiting from this property, it can compress image information in the periphery of the FOV, i.e., the uninterested area meanwhile maintains the image information in the central of the FOV, i.e., the interested area clear 32 , 33 .…”
Section: Introductionmentioning
confidence: 99%
“…However, the hybrid of the compound and human eyes has not yet been studied. Inspired by bionic technology, our group previously proposed an imaging system combining of these two eyes, but it is a passive imaging system and belongs to two-dimensional planar imaging 30 , 42 . Unlike our previous studies, we study a pulsed-laser 3D imaging method combined the large FOV feature of the compound eye and the space-variant resolution property of the human eye simultaneously.…”
A pulsed-laser three-dimensional imaging system inspired by compound and human hybrid eye is proposed. A diffractive optical element is used to enlarge field of view (FOV) of transmitting system and a receiving system consisting of a non-uniform microlens array, an aperture array, and an avalanche photodiode array is designed. The non-uniform microlens array is arranged on a curved surface to mimic large FOV feature of the compound eye. Meanwhile, the non-uniform microlens array is modeled to mimic space-variant resolution property of the human eye. On the basis of the proposed system, some simulation experiments are carried out. Results show that the entire FOV is up to 52°, and the resolution is 30 × 18. The proposed system has a high resolution in the center FOV and a low resolution in the peripheral FOV. The rotation and scaling invariances of the human eye are verified on the proposed system. The signal-to-noise ratio (SNR) increases with the increase in the number of rings and the maximum SNR locates at the outmost periphery area. This work is beneficial to the design of the pulsed laser three-dimensional imaging system with large FOV, high speed, and high resolution.
“…Our previous work designed a compound and human hybrid eye with a micro-lens array for 3D imaging [ 28 , 35 ]. Therefore, the proposed HBIS can also be used for 3D imaging with a large FOV and foveal ratio; this will be studied by our team in the future.…”
Section: Discussionmentioning
confidence: 99%
“…However, compared with PACE, the spatial resolution is not improved. A combined method was proposed in our previous work [ 28 ], which possesses the large FOV characteristic of CACE and the retina-like feature of human vision. To the best of our knowledge, there is currently no practical imaging method that can obtain FOV extension and super-resolution simultaneously.…”
Based on bionic compound eye and human foveated imaging mechanisms, a hybrid bionic image sensor (HBIS) is proposed in this paper to extend the field of view (FOV) with high resolution. First, the hybrid bionic imaging model was developed and the structure parameters of the HBIS were deduced. Second, the properties of the HBIS were simulated, including FOV extension, super-resolution imaging, foveal ratio and so on. Third, a prototype of the HBIS was developed to validate the theory. Imaging experiments were carried out, and the results are in accordance with the simulations, proving the potential of the HBIS for large FOV and high-resolution imaging with low cost.
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