LT0H34P Datasheet, PDF (3/3 Pages) Sharp Electrionic Components – Hologram Laser(3 beam) for MD players/recorders

LT0H34P
TEC S 940101
s Electro-optical Characteristics *1
(Tc=25˚C)
Parameter
Condition
MIN TYP MAX Units
Focus error signal offsetting *2
-0.4
0 +0.4 µm
Lead-in for focus error signal *3 Values at
10
19
RF Output amplitude (D2+D3+D4)*4
RES Output amplitude (D1-D5) *5
FES output amplitude
5µAp-p
5
0.3
10
0.55
30
µm
- µA p-p
1.0 µA p-p
Radial error balance *6
-20
-
20
%
D1,D2,D3,D4,D5: Refer to pattern segment No. (Fig.1)
*1 Measuring method is shown below.
Laser
Driver
APC
C.L.
HL
NA=0.17
f=10.74mm
Sharp's
Actuator
NA=0.45
f=3.4mm
Disk
TCD-782
(A-BEX)
Measuring method of electro-optical characteristics
*2 Distance between FES=0 and jitter Min. point
*3
FES
b
c
a
*4 Focus/radial servo is ON-state
*5 RES output amplitude: under the condition that only focus servo is effected
*6 (a - b) / 2
a+b
RES
a
GND
b
Factors *2 to *6 are measured with high-reflection disk
(TCD782 made by A-BEX) at 3µAp-p of FES output amplitude
3µAp-p of the FES output amplitude is set through focusing oscillation