LT0H49L Datasheet, PDF (3/3 Pages) Sharp Electrionic Components – Compact Hologram Laser

LT0H49L/T
Electro-optical Characteristics*1
Parameter
Symbol
Focus error signal offsetting*2
Focus error balance*3
Radial error balance*4
RF output amplitude*5
V RF
Focus error signal output amplitude*6
Radial error signal output amplitude
Condition
VRF=0.55V
VRF=0.55V
PO=3.0mW
PO=3.0mW
VRF=0.55V
VRF=0.55V
MIN.
0.5
20
20
0.38
0.23
0.08
Vcc=5V,Tc=25
TYP. MAX. Unit
0.5 µ m
20
%
20
%
0.9
V p-p
0.35 0.47
0.12 0.16
V p-p
V p-p
VA,VB,VE,VF : Refer to pattern segment No.(Fig.1).
*1 Measuring method is shown below.
Laser
Driver
APC
C.L
Actuator
Disk
(SONY:YEDS-18)
HL
NA=0.11
f=20.6mm
NA=0.50
f=4.5mm
Measuring method of electro-optical characteristics
*2 Distance between FES=0 and jitter Min. point
*3 (a - b) / (a + b)
A _{( + amplitude of FES)}
B _{( - amplitude of FES)}
*4 ^{( a - b )}
2X(a+b)
GND
a _{( + amplitude of RES )}
b ( - amplitude of RES )
*5 Amplitude of VA + VB + 2VC, focus/radial servo is ON-state.
*6 VB-VA at focus rocking condition
*7 VE-VF under the condition that only focus servo is effected.
As of January 1997
Tec.970101