scholarly journals Balanced-path homodyne I/Q-interferometer scheme with very simple optical arrangement using a polarizing beam displacer

2017 ◽  
Vol 25 (7) ◽  
pp. 8237 ◽  
Author(s):  
Seang Hor Eang ◽  
Kyuman Cho
Keyword(s):  
Optical Arrangement

Optical arrangement coupled to a radial shear cyclic interferometer to generate simultaneously two interferograms with a phase shift of π/ 2

2011 ◽  
Author(s):  
J. F. Casco Vásquez ◽  
C. I. Robledo Sánchez ◽  
M. Ortiz Gutiérrez ◽  
L. M. Arévalo Aguila ◽  
P. Nanco Hernandez
Keyword(s):  
Phase Shift ◽  
Optical Arrangement

scholarly journals Inelastic hyperspectral lidar for aquatic ecosystems monitoring and landscape plant scanning test

2018 ◽  
Vol 176 ◽  
pp. 01003
Author(s):  
Guangyu Zhao ◽  
Elin Malmqvist ◽  
Klas Rydhmer ◽  
Alfred Strand ◽  
Giuseppe Bianco ◽  
...  
Keyword(s):  
Diode Laser ◽  
Temporal Resolution ◽  
Aquatic Ecosystems ◽  
Focal Depth ◽  
Aquatic Organisms ◽  
Landscape Plant ◽  
Optical Arrangement ◽  
Spatio Temporal ◽  
And Behavior

We have developed an aquatic inelastic hyperspectral lidar with unrestricted focal-depth and enough sensitivity and spatio-temporal resolution to detect and resolve position and behavior of individual sub-millimeter aquatic organisms. We demonstrate ranging with monitoring of elastic echoes, water Raman signals and fluorescence from chlorophyllbearing phytoplankton and dye tagged organisms. The system is based on a blue CW diode laser and a Scheimpflug optical arrangement.

A miniaturized and high sensitive dual channel fluorimeter based on compact collinear optical arrangement

Talanta ◽  
2020 ◽  
Vol 211 ◽  
pp. 120698
Author(s):  
Fan Dang ◽  
Xuhui Geng ◽  
Jiamin Li ◽  
Jihui Wang ◽  
Yafeng Guan
Keyword(s):  
Dual Channel ◽  
Optical Arrangement

scholarly journals Optical Technique Using Nano-Spark Lightsource for Macro and Microscale Image Acquisition to Study Diesel Spray Atomization

2015 ◽  
Vol 773-774 ◽  
pp. 545-549
Author(s):  
Azwan Sapit ◽  
Mohd Azahari Razali ◽  
M. Jaat ◽  
Akmal Nizam Mohammad ◽  
Amir Khalid ◽  
...  
Keyword(s):  
Diesel Engine ◽  
High Resolution ◽  
Diesel Spray ◽  
Time Interval ◽  
Short Time Interval ◽  
Optical Technique ◽  
Dynamic Behaviors ◽  
Critical Data ◽  
Optical Arrangement ◽  
Air Mixing

Atomization and fuel-air mixing is an important process in diesel combustion. It directly affects the combustion and emission of diesel engine. Optical technique has the advantage of being unobtrusive in nature when compared to other technique. nanospark unit that has spark duration of 30ns was used as a lightsource to capture high resolution spray image using still film camera. The very short duration of the spark freeze the fast movement of the spray droplet, and sharp image of fuel droplet to be successfully captured by the camera, and then analyzed for sizing and spatial distribution. In addition, by using a more elaborate optical setup, dual image of the same spray can be captured, with a very short time interval between each of them. This provides the means to study dynamic behaviors of the diesel spray and also the droplets, as the progression of the spray and trajectory and velocity of the droplet can be analyze from these images. With the proposed optical technique and optical arrangement, microscopic detail of the diesel engine spray can be captured. Critical data such as droplet sizing can be extracted from this high resolution image. Furthermore, by introducing a more sophisticated optical arrangement coined dual-nano spark photography method, the droplet dynamic behaviors such as flying angle and velocity can be study.

scholarly journals I. Insect sight and the defining power of composite eyes

1894 ◽  
Vol 55 (331-335) ◽  
pp. 85-90 ◽  
Keyword(s):  
Optic Nerve ◽  
Optical Arrangement ◽  
Single Lens

The optical arrangement of the simple eyes of Vertebrates is well understood, but as regards the action of the composite eyes of Insects and Crustacea less certainty has hitherto prevailed. In the former class of eye a single lens, or its equivalent, forms an image on a concave retina, built up, as a sort of tesselated pavement, of the sensitive terminations of the fibres of the optic nerve, and, if the lens is perfect and the pupil large enough, the definition is limited by the distance apart of the nerve-terminations, for, in order that two objects may appear as two to the eye, they must subtend at least such an angle that their images as formed by the lens shall not fall on the same nerve-termination.

An Improved Optical Arrangement for Ultramicroscopic Studies

1965 ◽  
Vol 4 (9) ◽  
pp. 1201 ◽  
Author(s):  
Gerhard Heilmann
Keyword(s):  
Optical Arrangement
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