Light Observation Device Synchronized Rolling Readout

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Solution Overview

Problem

Conventional microscopy techniques using a single camera with rolling readout method face challenges in synchronizing imaging timings for comparative observation of two optical images, making it difficult to match exposure conditions between the images.

Innovation Solution

A light observation device with a light splitting optical system that splits observation light into two beams, focusing them to form separate optical images, and an imaging element with independent rolling readout capabilities in each pixel row group, where the control unit ensures identical rolling readout directions across pixel rows for synchronized signal detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single camera with rolling readout method is used to capture two optical images, then the device complexity is reduced, but the imaging timings at specific parts of the two optical images become different, making comparative observation difficult

Engineering Contradiction:
Improvecamera system complexityVSAvoidimaging timing synchronization
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The imaging element is divided into multiple pixel row groups (first pixel row group and second pixel row group) that can perform independent rolling readout. This segmentation allows each group to be controlled independently, enabling synchronized imaging timing across different optical images while maintaining the simplicity of a single camera system.

Inventive Principle:
Principle #1Segmentation

2Measurement precision

If independent rolling readout is enabled in multiple pixel row groups, then imaging timing synchronization is improved, but the control complexity increases

Engineering Contradiction:
Improveimaging timing synchronizationVSAvoidcontrol system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The control unit performs unified control of rolling readout directions across multiple pixel row groups, making the control mechanism universal rather than requiring separate control circuits for each group. This approach maintains imaging timing synchronization while avoiding proportional increases in control system complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates comparative observation between two optical images by ensuring uniform exposure conditions, even when using the rolling readout method, allowing for accurate matching of exposure timings and improved imaging accuracy.

Implementation Method 1

disperse observation light (e.g., fluorescence or the like) from a specimen according to wavelengths

Methodology Applied
Scientific EffectWavelength dispersion: Dispersion (of waves)

Implementation Method 2

an imaging lens configured to receive the first and second beams and focus the first and second beams to form first and second optical images

Methodology Applied
Scientific EffectFocusing: Focusing

Implementation Method 3

an imaging element which is arranged at image formation positions of the first and second optical images

Methodology Applied
Scientific EffectPhotoelectric conversion: Photoelectric Effect

Data Source

PatentUS10684459B2Light observation device, imaging device used for same, and light observation method
Publication Date: 2020.06.16 HAMAMATSU PHOTONICS KK
  • US10684459B2 patent drawing
  • US10684459B2 patent drawing
  • US10684459B2 patent drawing

AI summary

A light observation device has a light splitting optical system for splitting observation light of an observation object; an imaging lens for focusing split beams to form optical images thereof; an imaging device arranged at image formation positions of the two optical images and being capable of performing independent rolling readout in a pixel row group included in a region corresponding to the image formation position of one optical image and in a pixel row group included in a region corresponding to the image formation position of the other optical image; and a control unit for independently controlling the rolling readout in the one pixel row group and in the other pixel row group; the control unit performs control such that a direction of the rolling readout in the one pixel row group and a direction of the rolling readout in the other pixel row group are identical.