EVALUATION OF THE COAXIALITY OF OPTICAL SYSTEMS WITH LARGE MAGNIFICATION ON BLOCK CAMERAS

2021 ◽  
pp. 101-106
Author(s):  
Tuan
Keyword(s):  
Thermal Imaging ◽  
Image Intensifier ◽  
Optical Systems ◽  
Observation System ◽  
General Tendency ◽  
Laser Rangefinder ◽  
Low Light ◽  
Climate Conditions ◽  
Observation Systems ◽  
Large Magnification

The general tendency of observation weapons is the combination of sensors in one device, allowing multispectral observation devices. This facilitates flexible observation in different space, time and climate conditions. This type of observation devices is often called multispectral observation devices, which can be compact (hand-held) or an observation system. Multispectral observation devices often consist of a daylight channel, a night channel using thermal imaging technology or low light image intensifier systems in combanation with a laser rangefinder module. In this article, the authors suggested a method for surveillance, assessment and application of block cameras with the purpose of manufacturing multispectral observation systems and devices.

Threshold of detectability of image-intensifier optically-coupled CCD (I2-CCD) at low light level

1993 ◽  
Author(s):  
Yudan Li ◽  
Zebin Wei ◽  
Yisong Zou ◽  
Shanfeng Hou
Keyword(s):  
Image Intensifier ◽  
Light Level ◽  
Low Light

Methods for Determining the Characteristics of Laser Beams and the Optical Transmission

2014 ◽  
Vol 656 ◽  
pp. 345-350
Author(s):  
Iulian Nicola ◽  
Tudor Prisecaru
Keyword(s):  
Laser Beam ◽  
Experimental Measurement ◽  
Optical Transmission ◽  
Optical Systems ◽  
Laser Beams ◽  
Laser Rangefinder ◽  
New Methods

The paper presents new methods and procedures to measure the characteristics of laser beams and their transmission through optical systems. The paper describes the work procedures and equipments used to measure the characteristics of laser beams and their transmission through optical systems. Using these working procedures, experimental measurement for the characteristics of the beam for a 1.54 µm laser rangefinder and the transmission of a 633 nm laser beam through laser protection glasses were made.

Resolution Research of Low-light-level Image Intensifier Based on Electronic Trajectory Tracking

2020 ◽  
Vol 49 (12) ◽  
pp. 19-26
Author(s):  
邱亚峰 Ya-feng QIU ◽  
严武凌 Wu-ling YAN ◽  
华桑暾 Sang-tun HUA
Keyword(s):  
Trajectory Tracking ◽  
Image Intensifier ◽  
Light Level ◽  
Low Light

SUBSTANTIATION OF PARAMETERS OF THE 3D CDP FIELD OBSERVATION SYSTEM

2021 ◽  
pp. 40-47
Author(s):  
A. P. Sysoev ◽  
Keyword(s):  
Comparative Analysis ◽  
Distribution Density ◽  
Second Step ◽  
Image Point ◽  
Observation System ◽  
Kirchhoff Migration ◽  
Observation Systems ◽  
The Common ◽  
Gaussian Beam Migration ◽  
The Relationship

The substantiation of parameters of the 3D observation system is considered from the perspective of the Kirchhoff migration. At the first step of this transformation, on the basis of diffraction transformation on a gather of CSP, the problem of wavelet extraction reflected from specified points of the medium (image points) is solved. The characteristic of the directivity of this transformation is determined by parameters of the arrangement of devices. At the second step, summation is performed by gathers of the common image point (СIP). The distribution density of the observation system sources determines the stacking fold by CIP. In the process of selecting survey parameters, the comparative analysis of equivalent observation systems with the same data properties for the migration task, but with different parameters of the observation system, is of great important. The relationship between the step of common midpoints of the observation system and the step of traces of resulting images of the medium is discussed. The Gaussian beam migration algorithm is considered as a method for solving the problem of constructing an image of the medium that correctly takes into account the irregularity of the initial data.

scholarly journals Electro-optic imaging enables efficient wide-field fluorescence lifetime microscopy

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Adam J. Bowman ◽  
Brannon B. Klopfer ◽  
Thomas Juffmann ◽  
Mark A. Kasevich
Keyword(s):  
Temporal Resolution ◽  
Single Molecule ◽  
Fluorescence Lifetime ◽  
Collection Efficiency ◽  
Frame Rate ◽  
Optical Systems ◽  
Wide Field ◽  
Pockels Cell ◽  
Low Light ◽  
Optical Efficiency

Abstract Nanosecond temporal resolution enables new methods for wide-field imaging like time-of-flight, gated detection, and fluorescence lifetime. The optical efficiency of existing approaches, however, presents challenges for low-light applications common to fluorescence microscopy and single-molecule imaging. We demonstrate the use of Pockels cells for wide-field image gating with nanosecond temporal resolution and high photon collection efficiency. Two temporal frames are obtained by combining a Pockels cell with a pair of polarizing beam-splitters. We show multi-label fluorescence lifetime imaging microscopy (FLIM), single-molecule lifetime spectroscopy, and fast single-frame FLIM at the camera frame rate with 103–105 times higher throughput than single photon counting. Finally, we demonstrate a space-to-time image multiplexer using a re-imaging optical cavity with a tilted mirror to extend the Pockels cell technique to multiple temporal frames. These methods enable nanosecond imaging with standard optical systems and sensors, opening a new temporal dimension for wide-field low-light microscopy.

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