Features:
1. Measured more quickly because the technology of buile-in micro process and quick graphic process.
2. Quick measurement for diopter of min.Pupil size.
3. New design of colorful screen(5.7" TFT LCD
4. Auto fog chart.
5. Pupil distance auto measured available.
6. Choice for vertex distance.
page magnifier
Hand free page magnifier
Full page magnifier fresnel lens
Full page reading book magnifying glass
Rigid page magnifier
Full-page magnifier
Lighted full page magnifier for reading
Reading page magnifier
Reading magnifier and lighted full page magnifier for reading.
Fresnel page magnifiers
Full page magnifier for reading books, magazines, and newspapers
Measuring Principle
The internal stress of glass and plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn.
Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress.
From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process.
The inspection of plastic molds is more complex as the colored patterns cased by stress is irregular. A similar situation may occur with glass products, which is called stress stretching. For example, a qualified mold will have a large amount of stress released by tension.
The role of full-wave plate :
When testing glass samples without the full-wave plate, usually only black or gray shadow patterns can be seen. The full-wave plate increases or decreases the full wavelength of a phase difference, thereby forming a colored pattern, which is easier to analyze.
Optical Bypass Protection System Module OBP Module
Features
Wide Wavelength Range
Low Crosstalk
High Stability, High Reliability
Modularized Design
Specifications
Parameters Unit SUN-OBP-SS-L
Wavelength Range nm 1260 ~ 1650
Test Wavelength nm 1310 / 1550
Insertion Loss dB Typ: 1.2 Max: 1.5
Return Loss dB SM 45
Crosstalk dB SM 50
PDL dB 0.20
WDL dB 0.30
PD dark current nA 1
PD responsivity mA/W 24 ~ 40
PD report accuracy dB (at -50 to 23 dBm)
Operating voltage V 4.5 ~ 5.5
Operating current mA 80 ~ 120
Operating Temperature -5 ~ +60
Storage Temperature -30 ~ +80
Dimension mm 1208018
