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Automatic Birefringence Analyzer
KOBRA Series
•Wide measuring range...1~5900nm
•High accurate repeatability
•Excellent operative-ness
•Enhanced software
•Compact and low price |
> Feature
Principle |
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Measuring object: |
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Retardation film, placer, and polarizing plate |
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Optical disk |
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liquid crystal cell |
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Base film for magnetic tape |
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Shrink film |
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Film for miscellaneous |
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Usage: |
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Research and development and quality control of optical function film |
| • |
Evaluation for distribution of expanded film |
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Thermal contraction of wrapping film and evaluation of tear character etc. |
| • |
Residual stress evaluation of molded article |
| • |
Three dimension refractive index and plane orientation degree measurement |
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| Model |
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| KOBRA-WR |
KOBRA-WPR |
KOBRA-WX100 |
KOBRA-31PRW |
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| Measurement
method |
Parallel
Nicols |
Rotation
polarizer |
Parallel
Nicols |
Rotating
polarizer method, Parallel Nicol rotation method |
| Wave
length |
450,
550, 590, 630, 750nm |
450,
550, 590, 650, 750nm |
500,550,650,750nm |
| Sample
dimensions(mm) |
35sq
x t3 or less |
cut
sample:
35sq x t1.5 or less
long sample: W50 |
More
than 30 angles*1 |
| Measurement
area(mm2) |
33(5.8x5.8) |
33(5.8
x 5.8) |
| Measurement
items |
Retardation
Orientation angle
Visible angle characteristics
3-dimensional refractive index
Plane orientation degree |
Retardation
Orientation angle |
Retardation
Orientation angle |
Polarized
light board axis azimuth, Permeability of polarized
light board,Angle of pasted oval polarized light
board,Retardation,Wave length decentralization
characteristic of retardation |
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*1:When 31 PR and 31PR/A in non-incline |
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| Model |
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| KOBRA-WX100/IR |
KOBRA-WFD |
KOBRA-CCD |
KOBRA-WI
Series |
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| Measurement
method |
Parallel
Nicols |
Parallel
Nicols |
Parallel
Nicols |
Parallel
Nicols |
| Wave
length |
850,900,950,1000,1050,1100nm |
450,500,550,590,650,750nm |
590nm |
590nm |
| Sample
dimensions(mm) |
cut
sample:
35sq x t1.5 or less
long sample: W50 |
cut
sample:
35sq x t1.5 or less
long sample: W50 |
 |
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| Measurement
area(mm2) |
33(5.8x5.8) |
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| Measurement
items |
Retardation
Orientation angle |
Retardation
Orientation angle |
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| Model |
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| KOBRA-WIXY |
KOBRA-WIS/RT |
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| Measurement
method |
Parallel
Nicols |
Parallel
Nicols |
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| Wave
length |
850,900,950,1000,1050,1100nm |
590nm |
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| Sample
dimensions(mm) |
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| Measurement
area(mm2) |
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| Measurement
items |
Retardation
Orientation angle |
Retardation
Orientation angle, (Rth) |
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