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Aberrometer MultiSpot

 

aberrometer MultiSpot
Fig. 1

Test eye assembly simplifies calibrating the device
Fig. 2

 

 Aberrometer is used for automatic measuring of full aberrations of human eye. In order to perform such measurements infrared semi-conducting low-powered laser is used. This laser contains a scanning system, providing high precision of the measurements and absolute safety of the procedure for the patient. Precise alignment of the patient's eye is implemented with the use of a system of infrared markers for registration of the eye pupil location on the digital video camera. This provides more precise alignment. Short time (30 ms) and a long series of the measurement (up to 600 samples) allow to single out statistically important aberrations.
 

TECHNICAL SPECIFICATION:

 

wave front sensor type

Shack-Hartmann

 

number of microlenses:

MultiSpot-250
MultiSpot-250-HS
MultiSpot-1000

 

250
250
1000

 

refraction compensator
(automatically or manually)

from -14 up to +16 D

 

astigmatism compensator
(automatically or manually)

from -5 up to +5 D

 

refraction
measurement range

from -16 up to +20 D

 

astigmatism
measurement range

from -7 up to +7 D

 

measurement accuracy

0.1 D

 

input pupil location

43 mm ahead of the front cover

 

input pupil diameter

up to 8 mm

 

reference source

·  laser diode, mechanical scanner
· 
λ=785±25 nm
·  power <100 μW

 

single measurement time:

MuliSpot – 250
MuliSpot – 250-HS
MuliSpot – 1000



30 msec
12 msec
50 msec

 

number of frames
in one series
with possibility
of statistical processing

up to 600

 

alignment procedure

· CCD-camera centered
with respect to the visual axis

· IR markers projected onto the iris
to set the working distance

 

software

Windows 2000/XP/Vista

 

output data

·  aberrations
(up to 36 Zernike polynomials)
·  wavefront map
·  optical power map
·  error map
·  spot displacement map
(raw data)
·  image from
the Shack-Hartmann Sensor

 

power supply

·  120/240 V
·  50/60 Hz

 

input power

<30 W

 

size

400x600x500 mm

 

weight

<20 kg

 

PATENTS AND AWARDS:

Patent for invention     Patent for utility model     Diploma for International Trade Fair for Technological Innovation
 
Bronze figure "St. George". The award of 10th Anniversary International Forum "High technologies of the XXI century"     The award by a bronze figure "St. George" certificate

 

The MultiSpot aberrometers are now commercially available. Follow [ this link ] to visit the distributor’s site.