Topcon KR-1W, Instruction Manual

Page: 172 / 188

170
SPECIFICATIONS
DIMENSIONS AND WEIGHT
Dimensions: 304(W)x521(D)x474-504(H)mm
Weight:
23kg
PURPOSE OF USE
To measure the refractive power of the eye with a function of cornea topography, and to present
the measurement data to the eye care professional.
OPERATIONS AND PRINCIPLE OF OPERATION
To receive light flux from a secondary light source, projected from a light source (point light
source) placed at a position conjugate to the eyeground and formed on the retina, by a CMOS
sensor through a Hartmann board (formed with a two-dimensionally lined small lens array), and
determine the spherical refractive power, cylindrical refractive power, direction of astigmatic axis
and refractive wavefront aberration through computation.
To project a Placido ring to the cornea, receive the reflected image from the cornea surface using
a CCD camera, and determine the curvature radius, corneal refractive power, direction of corneal
astigmatic axis and corneal wavefront aberration through computation, and, to display the distribu-
tion of curvature radius by mapping.
ELECTRIC RATING
Supply voltage: 100-240VAC, 50-60Hz
Power input:
160VA
LASER ILLUMINATION SYSTEM
Laser output: 1.2mW or less
Laser wavelength: 820nm - 840nm
Laser medium:
Super luminescence diode (SLD)
Laser class: 1M
Laser exit: Measuring window