Design of an acousto-optic tunable filter based on momentum mismatching together with the rotatory property

Zhang, Chunguang; Wang, Hao; Sheng, Zhenfei; Zhang, Xiaofa; Yuan, Jiangwei; Shi, Lei; Wang, Pengchong

doi:10.1364/ao.57.008595

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…With the high spectral resolution of AOTF, hyperspectral microscopic imaging of biological tissues can be realized, and then image analysis and spectral analysis of biological tissues can be carried out. It plays an important role in biological tissue detection and pathological examination [1][2][3] .…”

Section: Spectral Imaging Can Collect the Spectral Information And Immentioning

confidence: 99%

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Hyperspectral microscopic imaging of skin squamous cell carcinoma

Sheng¹,

Zhang²,

Qiu³

et al. 2019

14th National Conference on Laser Technology and Optoelectronics (LTO 2019)

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Acousto-optic tunable filter (AOTF) is a new type of light splitter with fast tuning, stable structure and portability. In this paper, a hyperspectral microscopic imaging system is constructed by combining non-collinear AOTF with optical inverted microscopy. The feasibility of data augmentation based on hyperspectral images for object detection of skin squamous cell carcinoma is studied. The hyperspectral images collected from unstained sections of skin squamous cell carcinoma are processed into dataset. At the same time, the mature open source object detection model is selected and trained for 20,000 times. Using the trained model to detect the lesion area of other unstained sections, it is found that the model trained by hyperspectral image dataset has a good ability to distinguish the non-lesion area, and there is no false detection. And the model has a relatively accurate detection ability for large lesion area, but the results of the model for small lesion area are not ideal. After analysis, it is considered that the number of samples can be increased firstly, especially in small lesions, and the same to the hyperspectral images. In addition, the model for lesion detection can be further optimized. By increasing the complexity of the model, the model can learn more details and information in the image during the training process. The preliminary results of the experiment prove that hyperspectral imaging is feasible for data augmentation of lesion object detection dataset. This paper provides a new method for the object detection data augmentation of skin squamous cell carcinoma.

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Section: Spectral Imaging Can Collect the Spectral Information And Immentioning

confidence: 99%

“…Inside TeO2, the sound velocity of ultrasonic waves propagating along [110] direction is very low, about 616m/s. So TeO2 has high acousto-optic value and high diffraction efficiency [2,3] .…”

Section: Principlementioning

confidence: 99%

Hyperspectral microscopic imaging of skin squamous cell carcinoma

Sheng¹,

Zhang²,

Qiu³

et al. 2019

14th National Conference on Laser Technology and Optoelectronics (LTO 2019)

Self Cite

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“…Therefore, within a small angle range, many scholars only considered the impact of incident light angle on device performance. Zhang Zhonghua analyzed the influence of the incident light angle on the spectral bandwidth, diffraction efficiency, and the separation angle inside and outside the crystal; however, their analysis is limited to the interaction plane of AOTF [14][15][16][17]. Yushkov gave the analytical expressions of the central wavelength and the tuning frequency under oblique incidence [18], but for some special applications, the precise geometric information of the target is required.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Influence of Incident Light Angle on the Spatial Aberrations of Acousto-Optical Tunable Filter Imaging

Zhao

2022

Materials

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Acousto-optical tunable filter (AOTF) does not conform to the pinhole model due to the acousto-optic interaction. A calculation method of AOTF aberrations under the condition of incident light with a large arbitrary angle is proposed to solve the problem of coordinate mapping between object space and image space of the AOTF system without refractive index approximation. This approach can provide accurate pointing information of the interested targets for the tracking and searching system based on AOTF. In addition, the effect of cut angle values of the paratellurite crystal on aberrations was analyzed to optimize the design of AOTF cutting according to different application requirements. Finally, distribution characteristics and quantitative calculation results of AOTF aberrations were verified by experiments with different targets, respectively. The experimental results are in good agreement with the simulations.

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A review of non-polar liquids as materials for bulk acousto-optic devices operating with terahertz radiation

Nikitin

2019

J. Phys.: Conf. Ser.

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In this paper, the acoustic and optical properties of a number of liquids transparent in the terahertz range are systematized. The acousto-optic quality is calculated for the quasi-orthogonal and collinear geometry of the acousto-optic interaction. The parameters of acousto-optic deflectors and filters of terahertz radiation are determined. The diagrams linking the resolution for the filter and the maximum number of resolvable elements for the deflector with the diffraction efficiency are given.

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Design of an acousto-optic tunable filter based on momentum mismatching together with the rotatory property

Cited by 3 publications

References 23 publications

Hyperspectral microscopic imaging of skin squamous cell carcinoma

Hyperspectral microscopic imaging of skin squamous cell carcinoma

Analysis on the Influence of Incident Light Angle on the Spatial Aberrations of Acousto-Optical Tunable Filter Imaging

A review of non-polar liquids as materials for bulk acousto-optic devices operating with terahertz radiation

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