LT0H12M Datasheet, PDF (3/3 Pages) Sharp Electrionic Components – Hologram Laser(1 beam) for Magneto-Optical disk

LT0H12M
TEC N 940525
s Electro-optical Characteristics *1
(Tc=25˚C)
Parameter
Condition
MIN TYP MAX Units
Focus error signal offsetting *2
-20
-12
-4
%
Lead-in for focus error signal *3
-
90
-
µm
Radial offsetting *4
FES Output amplitude *5
Laser output 4.2mW ^-10
-
10
%
2.4
3.9
5.0 µA p-p
RES Output amplitude *5
2.5
3.3
4.1 µA p-p
*1 Measuring method is shown below.
Actuator
MO Disk
Laser
Driver
C.L.
HL
NA=0.35
f=6.0mm
O.L
NA=0.5
f=3.45mm
* Distance between C.L-O.L: 27mm C.L: Collimator lens O.L: Objective lens
Measuring method of electro-optical characteristics
*2 FES output (a)/FESp-p at Maximum point of
*3
the FES output amplitude
GND
a
FESp-p
GND
*4 ( a - b ) / 2 ( a + b )
a
GND
b
*4 ( a - b ) / ( a + b )
a
b
*5 Values at 4.2mW of the laser output
Both FES output amplitude (D2-D3)
and RES output amplitude (D1-D4) are
p-p values at focusing oscillation