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參數(shù)資料
| 型號： | HUL7001 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | Hologram Unit |
| 中文描述： | SPECIALTY OPTOELECTRONIC DEVICE |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 81K |
| 代理商： | HUL7001 |
3
Hologram Unit
HUL7001
Focus Error Signal Amplitude and Pull-in
Range (Fig. 3)
Tracking Error Signal Amplitude and Pull-in
Range (Fig. 4)
I
FE
: Focus error signal amplitude
D
FE
: Focus error signal pull-in range
Focus error
signal
D
FE
I
FE
Objective lens
movement
+
–
0
Tracking error signal amplitude I
TE
= A
Tracking error signal symmetry B
TE
= A
×
100 (%)
Tracking error
signal strength
Signal amplitude
center ground level
A
Time
A : Tracking signal amplitude
B :
Difference between tracking signal
amplitude center and electrical center
B
B
Focus Error Signal Defocusing (Fig. 5)
+
0
–
Approaching disk
I
FE
S
(D
J
)
Jitter
(ns)
D
J
High
Low
Focus error signal
Moving away from disk
Objective lens
movement (
μ
A)
In the diagram, point 0 is the point at
which the focus error signal equals 0.
D
J
: Objective lens movement from position where focus error signal
is 0 to jittering-best position.
S
(D
J
)
: Amount of focus error signal at D
J
I
FE
: Focus error signal amplitude
Focus error signal
defocusing D
FO
=
S
(D
J
)
I
EF
×
100 (%)
(Definition of focus error signal defocusing)
Amount of focus error signal at jitter-best position as
a percentage of focus error signal amplitude (%)
Optical Block Diagram During Measurement (Fig. 2)
(a) Radiant power measurement system of
hologram unit (HUL7001)
(b) Reference optical system during measurement
Hologram unit
(HUL7001)
PKG reference surface
3.1mm
aperture
19.0mm
Optical axis
Apparent light emitting point
25.3mm
Collimator lens
f = 25.3mm
NA = 0.105
Objective lens
f = 4.5mm
NA = 0.45
Actuator
Disk :
A disk satisfying
CD specifications
is used.
Light detecting element
(10mm) or laser light
input element of coherence
measurement system
(Note) The aperture and the light detecting element
are positioned perpendicular to the axis of
the light emitted from the hologram unit;
the optical axis is positioned so as to pass
through the center of the aperture.
The RF signal, focus error signal, and tracking error signal are measured using
the above reference optical system and the equations shown in Fig. 1.
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| HUL7202 | Hologram Unit |
| HUL7203 | Hologram Unit |
| HUL7206 | SPECIAL-PURPOSE OPTO DEVICE |
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| HUL7254 | Opto-Electronic Device - Hologram Unit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HUL7202 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Hologram Unit |
| HUL7203 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Hologram Unit |
| HUL7206 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SPECIAL-PURPOSE OPTO DEVICE |
| HUL7207 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Hologram Unit |
| HUL7251 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SPECIAL-PURPOSE OPTO DEVICE |
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