Session Index

The purpose of this paper is to improve the non-uniform illuminated region by using exponential correction method. The experimental results show that non-uniform illumination often results in undesirable depth map. First we pre-process the image with exponential correction, then the depth map can be recovered by shape from focus (SFF).

 

A 3D lens structure can be prepared by stereolithography set-up which including a high resolution phase-only LCoS, z-axis direction translation stage. Using 1 mm radius of curvature as target, resulting 0.91 mm height 2.03 mm of base diameter printed objects were achieved. The error is estimated at 2.7%

 

This study provided a novel H2O2 sensor which integrated an enzymatic sensing film on the backside of a holographic plate. Results showed the proposed method provided high stability and resolution within the measurement range of 1 ppm to 10 ppm.

 

We use low-cost aspheric lenses, Raspberry Pi CMOS modules and white LED lights to build an optical system with a neural network YOLO algorithm to automatically calculate whether the number of red blood cells in the blood is normal.

 

Through the projection light image analysis method, the light intensity distribution of a free form surfaced LED can be accomplished much faster than other approaches. Comparing the optical experimental results of the LED lamps by Gonio-photometer and the proposed projected light image analysis method,

 

Abstract: Combines hyperspectral imaging and deep learning to propose air pollution detection method.Use the visible light hyperspectral imaging technology is given Hyperspectral information.Through the classification algorithm,3D-CAE and PCA are respectively proposed and combined with VGG-16 to discuss the optical haracteristics of air pollution and the accuracy of model recognition.

 

This study presents a particle detection method by using novel phase encoded method in common-path DHM. The particles at different slice of the sample can be measured by using virtual spatial filter recording technique which can avoid the diffraction information from the other slice of the sample.

 

PQ:PMMA can be dissolved in oxolane solvent and dispersed on glass substrate to form a film. Applying doctor-blade method with thickened solution, a rather uniform PQ:PMMA film can be formed. Series test on recording hologram grating on such film were performed and a corresponding model is established.

 

The simplified equations of astigmatism and anamorphic for waveguide combiners were proposed in this paper. The results of the equations matched to the simulation of the commercial ray-tracing software Zemax. It will make the designing process become simpler and faster.

 

An error-controlled method using pulsed-encoded patterns to identify fringe orders for phase-shifting projected fringe profilometry is presented. Phase-extraction and unwrapping can be performed directly by the pulsed-encoded patterns. There is no need to take additional projections for phase unwrapping.

 

A one-shot method using the two-dimensional fringe-encoded pattern for Fourier transform profilometry is presented. The 2D fringe-encoded pattern provides additional information to identify the fringe order. Even though the surface color or reflectivity varies with positions, fringe orders can be identified precisely.

 

We present a method for phase quantization of diffractive optical element (DOE) which combines the iterative Fourier transform algorithm, a backward quantization method, and the large-error reduction algorithm. The method has been effectively and in high efficiency applied to binary-phase DOEs.

 

The work is devoted to development of a new method for rapid estimation of the concentration of optical defects in the form of nonlinear refractive index inhomogeneities. The proposed method is based on analysis of the angular spectrum of diffraction patterns obtained using previously demonstrated TRIDH method.