Temperature Coefficient of Refractive Index Measurement System for Optical Glass
Controls the temperature of the glass sample while measuring the refractive index with a GMR-1D or GM-1D Precision Spectrometer. The -40oC to +80oC sample temperature range, ±0.5oC distribution accuracy, and ±0.2oC measurement accuracy comply with the Japanese Optical Glass Industrial Standards (JOGIS). Can display the temperature coefficient of absolute refractive index and the temperature coefficient of relative refractive index.
Measurement of temperature coefficient of refractive index in optical glass Measurement of refractive index at any constant temperature Precise angle and refractive index measurements for prisms, etc.
|Measurement accuracy||Angular measurement accuracy: ±1"
Refractive index measurement accuracy: ±0.00001
|Display||Angle counter digital display|
|Measurement wavelength range||GMR-1DT: 254 nm to 2500 nm (with IR option)|
|Sample vessel leak rate||1 x 10-9 atm cc/s max.|
|Temperature control range||-40oC to +80oC|
|Temperature coefficient measurement ranges||-40oC to -20oC, -20oC to 0oC, 0oC to +20oC,
+20oC to +60oC, +60oC to +80oC
|Temperature control accuracy||±0.2oC|
|Sample temperature distribution||±0.5oC max.|
|Continuous operation time||3 hours, -40oC to +80oC|
Specifications - Variable Temperature Cryostat (Integral with Vessel)
|Chamber shape||Cylindrical (160 mm dia. x 415 mm long)|
|LN2 vessel||2 liters|
|Sample vessel material||C1100|
|Heat-exchange material||Copper wool|
|Heater output||100 V/150 W|
|Temperature measurement sensors||alumel - chromel (for control)
copper - constantan (for sample temperature measurement)
Specifications -Temperature Controller
|Power supply||100 V, 10 A max.|
|Cooling control||Mass-flow controller, electronic PID control|
|Heating control||4 to 20 mA, current-control PID|
|External data||Can be output from temperature controller to PC (RS-232C interface)|
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