Holographic optical element and its manufacturing method

Conversion of depth information linearly into planar information!

Overview

In 3D imaging, it is important to effectively encode z information, which is the image formation displacement of the target object, into XY information, which is displacement from the optical axis of the image surface. On the other hand, in single-pixel imaging using only a single detector, it is important to encode in efficient manner the XY information of the target into the time information. However, the conventional encoding method has a limit on distance resolution, imaging distance range, z information decoding accuracy and encryption uniqueness.

This invention provides a new and improved hologram optical element, its manufacturing method and an optical device able to mutually convert Z & XY information with simple configuration. This invention is able to realize high accuracy and high spatial resolution for high-speed 3D imaging (patent US10816474) by converting the object depth direction information of the optical detection system into the planar direction information at the detecting surface.

Product Application

・Optical field such as optical microscope
・Fast sensing for depth direction in 3D space

Related Works

[1] T. Nakamura et al., Opt. Lett. 43, 5949 (2018).
[2] Y. Kozawa et al., Biomed. Opt. Express 13, 1702 (2022)
[3] Press release (Tohoku Univ.)

IP Data

IP No.　 ： JP7021772
Inventor ： NAKAMURA Tomoya, IGARASHI Shunsuke, KOZAWA Yuichi
keyword ： Measurement, Machine, Control