HMUAJ-P2-H1 [HRS]
Fiber Optic Connector, 50/125um, Multi Mode, Duplex, Plug;型号: | HMUAJ-P2-H1 |
厂家: | HRS |
描述: | Fiber Optic Connector, 50/125um, Multi Mode, Duplex, Plug |
文件: | 总16页 (文件大小:829K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MU-type High-Density Plug-in Optical Fiber Connectors
HMU Series
HMUB-type Fiber Connectors
ꢀFeatures
1. MU-type Correspondence
These connectors can be used with the NTT, MU-type optical fiber connectors.
JIS C5983 (F14 optical fiber connectors)
IEC 61754-6
2. Plug-in Housing
The plug-in housing has a self-holding mechanism which does not exert a pushing force on the back panel
when in the coupled condition.
3. Back Panel Side Optical Terminals
Insertion and withdrawal of back panel side optical terminals is even possible when the back panel and
the package are in the coupled condition.
4. Wide Variation of Connectors for Junction Applications
No. of Gangs
1
2
3
Type
Board mounting
Junction panel mounting
5. Optical Terminals
The optical terminals (optical connectors) are ultra-miniature optical fiber connectors that use the same
fastening mechanism as the SC-type optical fiber connectors (JIS C 5973).
ꢀApplications
Optical terminal equipment, optical relay racks, measuring instruments, etc.
5
ꢀProduct Standards
Rating
Operating temperature range
Storage temperature range
-25ç~70ç
-25ç~70ç
Item
Test Method (JIS C 5961)
Standard
(SM) 1,300nm wavelength (LD)
0.5 dB or less (PC, AdPC)
0.3 dB or less (PC)
Insertion loss
(GI)
(SM)
(GI)
1,300nm wavelength (LED)
Optical
Performance
22 dB or greater (PC) 40 dB (AdPC)
22 dB or greater (PC)
Reflection
attenuation
1,300nm wavelength (LD)
Simplex plugs Coupling force
Separation force 20N or less
Duplex plugs Coupling force 30N or less
Separation force 30N or less
20N or less
Measure when connectors are coupled
and separated in the direction of the axis.
Coupling force and
decoupling force
Split sleeve holding
force of the sleeve
holder and the adapter
Zirconia
Zirconia gauge of Ø1.249 0.0005 mm
1~2.5N
±
Cable clamp strength
(Pulling in direction of
axis)
70 N of pulling force between connector
and cable for one minute
1) Insertion loss fluctuation after test: 0.2dB or less
2) No irregularity in clamp section or cable
Mechanical
Performance
200 times (Plug-in housing)
500 times (Plug)
Repetitive operation
Vibration resistance
Shock resistance
Vibration range of 10 to 55 Hz
Test in 3 directions, 2 hours each
Acceleration of 981 m/s2
3 axes, both directions, 5 times each
(Total of 15 times)
1) Insertion loss fluctuation after test: 0.2 dB or less
2) No damage, cracks, or part looseness
Humidity resistance
(Temperature and
humidity cycle)
_
Temperature 10ç to 65ç,
humidity 90 to 96% 10 cycles
_
Temperature cycle
Heat resistance
Cold resistance
Salt fog
Temperature 25ç to 70ç 100 cycles
Environmental
performance
Leave for 960 hours at a temperature of 85ç
_
Leave for 960 hours at a temperature of 25
ç
Left in a 5% concentration of salt fog for 48 hours No conspicuous corrosion
ꢀMaterials
Component
Material
Polybutylene terephthalate
Piano wire
Notes
Simplex plug casing
Coil spring
Ferrule
Zirconia
Simplex adapter casing
Duplex adapter casing
8-ganged adapter casing
Plug-in connector casing
Split sleeve
Polyphenylene sulfide
Polyphenylene sulfide
Polyphenylene sulfide
Polyphenylene sulfide
Zirconia or Copper alloy
NTT, MU corresponding item
6
ꢀTypes
Types
No. of gangs Cable Diameter
Notes
Polishing
PC
AdPC
PC
AdPC
PC
AdPC
PC
AdPC
_
_
_
_
Product Number
HMUA-P2-H1
Ø2
HMUA-P2-H2
HMUA-P1-H1
HMUA-P1-H2
HMUA-2P2-H1
HMUA-2P2-H2
HMUA-2P1-H1
HMUA-2P1-H2
HMUA-RA-1
1
With knob
Ø0.9
Plug housing
Ø2
2
With knob
With knob
Ø0.9
Back
Panel
Side
_
Receptacle attachment
Terminator
1
2
8
2
_
_
_
_
_
HMUA-TM-1
HMUB-L2PA-1
HMUB-L8PA-1
HMUB-L2HA-1
HMUB-L2HB-1
HMUB-L8HA-1
HMUB-L8HB-1
HMUB-SH-1
HMUA-F3-A []
HMUAJ-P2-H1
HMUAJ-P2-H2
HMUAJ-P1-H1
HMUAJ-P1-H2
HMUAJ-TM-1
HMUA-A-1
HMUA-AS-1
HMUA-AH-1
HMUA-2A-1
HMUA-2AS-1
HMUA-2AH-1
HMUA-8A-1
HMUA-8AS-1
HMUA-8AH-1
Package side
For back panel side 2.4mm panel
For 3.2mm panel
Connector housing
_
_
_
_
For 2.4mm panel
For 3.2mm panel
8
1
Sleeve holder
Ferrule
Small-diameter zirconia ferrule
Without knob
PC
AdPC
PC
AdPC
_
_
_
_
_
_
_
_
_
_
Ø2
Package
side
Plug housing
Terminator
1
Ø0.9
_
_
Without knob
For panel mounting
For screw mounting
For board mounting
For panel mounting
For screw mounting
For board mounting
For panel mounting
For screw mounting
For board mounting
_
_
_
1
_
_
_
Adapter
2
_
_
8
ꢀUsage Precautions
Insertion and Withdrawal of Plugs by Tool
The various tools should be used properly according to the Application,
Suitable Adapter and Connector Housing, and Suitable Plug as listed in the table below. These
connectors are mounted in high density and require a reliable operation to be performed with a tool.
Instruction manuals are available. Please request them.
Applicable Adapter and
Connector Housing
HMUA-A-1,2A-1,8A-1,AS-1,
2AS-1,8AS-1
Applicable Plug
Application
Tool Product Number
HMUA-TP-1
(Plug housing name listed)
HMUA-P1-H1 • 2,2P1-H1 • 2
HMUA-P2-H1 • 2,2P2-H1 • 2
HMUA-P1-H1 • 2,2P1-H1 • 2
HMUA-P2-H1 • 2,2P2-H1 • 2
Insertion and withdrawal of plugs
HMUB-L2HA-1,L2HB-1,
L8HA-1,L8HB-1
HMUB-TP-1
Plug extraction
Insertion and withdrawal of sleeve holders HMUB-L2PA-1,L8PA-1
HMUB-L2PA-1,L8PA-1
HMUAJ-P1-H1 • 2,P2-H1 • 2
HMUAJ-P1-H1 • 2,P2-H1 • 2
HMUA-P2-H1 • 2,2P2-H1 • 2
HMUAJ-P2-H1 • 2
HMUB-TJ-1
HMUB-TS-1
HMUA-TK-1
HMUA-TK-2
__
Locking of plugs
__
7
ꢀFunctions Diagram
Duplex plug
Terminator
Simplex plug
8-Ganged housing
HMUA-2P2-H1 or
H2, and HMUA-
F3-A***
HMUA-TM-1
HMUA-P2-H1 or
H2, and HMUA-
F3-A***
HMUB-L8HA-1 or
HMUB-L8HB-1
8-Ganged housing
HMUB-L8PA-1
Dust cap
HMUA-DP-1
Simplex plug
HMUAJ-P2-H1 or
H2, and HMUA-
F3-A***
Duplex housing
HMUB-L2HA-1 or
HMUB-L2HB-1
Terminator
HMUAJ-TM-1
Sleeve holder
Dust cap
Duplex housing
Simplex plug
HMUB-SH-1
HMUB-DJ-1
HMUB-L2PA-1
HMUAJ-P1-H1 or
H2, and HMUA-
F3-A***
8
ꢀBack Panel Side Connector Housing
B
Mounting Hole Dimensions Diagram
ꢀDuplex Back Panel Side Connector Housing
Product Number
HMUB-L2HA-1
HMUB-L2HB-1
HRS No.
Mounting Panel Thickness
2.4mm
CL710-0017-8
CL710-0018-0
3.2mm
(NOTE 1) This duplex back panel side connector housing should be used in
conjunction with a simplex or duplex plug housing furnished with a knob
(for 2 cable, and for core wire).
(NOTE 2) The recommened clamp torque to be 3.1N
B
Mounting Hole Dimensions Diagram
ꢀ8-Ganged Back Panel Side Connector Housing
Product Number
HMUB-L8HA-1
HMUB-L8HB-1
Product Number
Mounting Panel Thickness
2.4mm
CL710-0019-3
CL710-0020-2
3.2mm
(NOTE 1) This 8-ganged back panel side connector housing should be used
in conjunction with a simplex or duplex plug housing furnished with a knob
(for _2 cable, and for core wire).
(NOTE 2) The recommened clamp torque to be 3.1N
ꢀTerminator (Back Panel Side)
Product Number
HRS No.
Reflection Attenuation Applicable Optical Fiber
HMUA-TM-P1
CL821-0007-6
≥40dB
SM-9.5/125
Specifications
Item
Standard Value
Rated input power
Reflection attenuation
≤30mW
≥40dB(48dB TYP.)
Suitable wavelength band 1.3µm,1.55µm
Operating temperature
Humidity
-25ç~70ç
≤95
%
Storage temperature
-40ç~80ç
(NOTE) See page 87 in detail
9
ꢀBack Panel Side Plug Housing
ꢀPlug Housing for Simplex Ø2 Cable With Knob
Product Number
HMUA-P2-H1
HMUA-P2-H2
HRS No.
Applicable Cable Diameter
Ø2mm
Hood Color
Blue
Polishing Specification
CL710-0047-9
CL710-0001-8
For PC polishing
Ø2mm
Light purple For AdPC polishing
ꢀPlug Housing for Duplex Ø2 Cable With Knob
Product Number
HMUA-2P2-H1
HMUA-2P2-H2
HRS No.
Applicable Cable Diameter
Ø2mm
Hood Color
Blue
Polishing Specification
CL710-0048-1
CL710-0002-0
For PC polishing
Ø2mm
Light purple For AdPC polishing
ꢀPlug Housing for SimplexØ0.9 Cable With Knob
Product Number
HMUA-P1-H1
HMUA-P1-H2
HRS No.
Applicable Cable Diameter
Ø0.9mm
Hood Color
Blue
Polishing Specification
CL710-0068-9
CL710-0069-1
For PC polishing
Ø0.9mm
Light purple For AdPC polishing
NOTE: Full length 28mm product also available.
ꢀPlug Housing for DuplexØ0.9 Cable With Knob
Product Number
HMUA-2P1-H1
HMUA-2P1-H2
HRS No.
Applicable Cable Diameter
Ø0.9mm
Hood Color
Blue
Polishing Specification
CL710-0070-0
CL710-0071-3
For PC polishing
Ø0.9mm
Light purple For AdPC polishing
NOTE: Full length 28mm product also available.
10
ꢀPackage Side Connector Housing
B
Mounting Hole Dimensions Diagram
ꢀDuplex Package Side Connector Housing
Product Number
HMUB-L2PA-1
HRS No.
CL710-0015-2
(NOTE 1) This duplex package side connector housing should be used in conjunction
Ø
with a simplex sleeve holder and simplex plug housing without a knob (for 2 cable,
and for core wire).
(NOTE 2) The recommended clamp torque to be 14.9N
B
Mounting Hole Dimensions Diagram
ꢀ8-Ganged Package Side Connector Housing
Product Number
HMUB-L8PA-1
HRS No.
CL710-0016-5
NOTE: This 8-ganged package side connector housing should be used in conjunction
Ø
with a simplex sleeve holder and simplex plug housing without a knob (for 2 cable,
and for core wire).
(NOTE 2) The recommended clamp torque to be 14.9N
ꢀTerminator (Package Side)
Product Number
HRS No.
Reflection Attenuation Suitable Optical Fiber
HMUAJ-TM-P1
CL821-0008-9
≥40dB
SM-9.5/125
Specifications
Item
Standard Value
Rated input power
Reflection attenuation
≤30mW
≥40dB(48dB TYP.)
Suitable wavelength band 1.3µm,1.55µm
Operating temperature
Humidity
- 25ç 70ç
~
≤95%
Storage temperature
- 40ç 80ç
~
(NOTE) See page 87 in detail
11
ꢀPackage Side Connector Housing
ꢀPlug Housing for Simplex Ø2 Cable Without Knob
Product Number
HMUAJ-P2-H1
HMUAJ-P2-H2
HRS No.
Applicable Cable Diameter
Ø2mm
Hood Color
Blue
Polishing Specification
CL710-0050-3
CL710-0004-6
For PC polishing
Ø2mm
Light purple For AdPC polishing
ꢀPlug Housing for Simplex Ø0.9 Cable Without Knob
Product Number
HMUAJ-P1-H1
HMUAJ-P1-H2
HRS No.
Applicable Cable Diameter
Ø0.9mm
Hood Color
Blue
Polishing Specification
CL710-0049-4
CL710-0003-3
For PC polishing
Ø0.9mm
Light purple For AdPC polishing
NOTE: A jig is available for measuring the optical characteristics of a knobless plug through the
use of an adapter. (HRS No. and Product Number: CL710-0085-8, HMUA-RH-1)
ꢀSimplex Sleeve Holder
NOTE: This sleeve holder should be used in
conjunction with a duplex and 8-ganged package
side connector housing and
a simplex
_2cable/simplex _0.9 cable plug housing without
a knob. Also note that assembly should be
performed using a sleeve holder insertion and
withdrawal tool (HMUB-TS-1), having the gold
plated portion facing the direction of the package
side connector housing.
Product Number
HMUB-SH-1
HRS No.
CL710-0021-5
ꢀFerrule
Product Number
HRS No.
Dimension A Applicable Optical Fiber
HMUA-F3-A123 CL710-0022-8
HMUA-F3-A124 CL710-0023-0
HMUA-F3-A125 CL710-0024-3
HMUA-F3-A126 CL710-0025-6
HMUA-F3-A127 CL710-0026-9
HMUA-F3-A128 CL710-0027-1
0.123
0.124
0.125
0.126
0.127
0.128
SM-9.5/125
GI-50/125
12
ꢀAdapters
B
Mounting Hole Dimensions Diagram
ꢀSimplex Adapter Panel Mounting Type
panel thickness t=1.6
Product Number
HMUA-A-1
HRS No.
Type of Mounting
CL710-0005-9
Panel (1.6mm thick)
B
Mounting Hole Dimensions Diagram
ꢀSimplex Adapter Screw Mounting Type
panel thickness t=1.6
Product Number
HMUA-AS-1
HRS No.
Type of Mounting
Panel (screw)
CL710-0006-1
B
Mounting Hole Dimensions Diagram
ꢀSimplex Adapter Board Mounting Type
panel thickness t=1.6
Product Number
HMUA-AH-1
HRS No.
Type of Mounting
CL710-0007-4
Board (1.6mm thick)
13
ꢀDuplex Adapter Panel Mounting Type
B
Mounting Hole Dimensions Diagram
panel thickness t=1.6
Product Number
HMUA-2A-1
HRS No.
Type of Mounting
CL710-0008-7
Panel (1.6mm thick)
B
Mounting Hole Dimensions Diagram
ꢀDuplex Adapter Screw Mounting Type
panel thickness t=1.6
Product Number
HMUA-2AS-1
HRS No.
Type of Mounting
Panel (screw)
CL710-0009-0
B
Mounting Hole Dimensions Diagram
ꢀDuplex Adapter Board Mounting Type
panel thickness t=1.6
Product Number
HMUA-2AH-1
HRS No.
Type of Mounting
CL710-0010-9
Board (1.6mm thick)
14
B
Mounting Hole Dimensions Diagram
ꢀ8-Ganged Adapter Panel Mounting Type
panel thickness t=1.6
Product Number
HMUA-8A-1
HRS No.
Type of Mounting
CL710-0011-1
Panel (1.6mm thick)
B
Mounting Hole Dimensions Diagram
ꢀ8-Ganged Adapter Screw Mounting Type
panel thickness t=1.6
Product Number
HMUA-8AS-1
HRS No.
Type of Mounting
Panel (screw)
CL710-0012-4
B
Mounting Hole Dimensions Diagram
ꢀ8-Ganged Adapter Board Mounting Type
panel thickness t=1.6
Product Number
HMUA-8AH-1
HRS No.
Type of Mounting
CL710-0013-7
Board (1.6mm thick)
15
ꢀSimplex Receptacle Attachment
Insert the MU-RA-type receptacle
attachment straight on, tighten the
screw and fix.
Product Number
HMUA-RA-1
HRS No.
Notes
CL710-0014-0
For measurement of optical characteristics
NOTE: This receptacle attachment is used with HRPI-R-L as a set
and attached to a measuring instrument such as a sensor for
measurements of such as the optical power.
ꢀDust Caps
ꢀPlug Dust Cap (Back Panel Side)
Product Number
HMUA-DP-1
HRS No.
Applicable Adapter and Connector Housing
HMUA-A-1,AS-1,AH-1
CL710-0059-8
HMUA-2A-1,2AS-1,2AH-1
HMUA-8A-1,8AS-1,8AH-1
HMUB-L2HA-1,L2HB-1
HMUB-L8HA-1,L8HB-1
ꢀPlug Dust Cap (Back Panel Side)
Product Number
HMUB-DJ-1
HRS No.
Applicable Connector Housing
HMUB-L2PA-1
CL710-0060-7
HMUB-L8PA-1
16
ꢀConnectors with Cable Attached
ꢀPlug Housing for Simplex Ø2 Cable With Knob
Type of Polishing
PC polishing
Product Number
HMUA-SP1-F3Q-L
HMUA-SP2-F3Q-L
HMUA-ASP1-F3Q-L
HMUA-ASP2-F3Q-L
HMUA-SP1-F3P-L
HMUA-SP2-F3P-L
HMUA-ASP1-F3P-L
HMUA-ASP2-F3P-L
HRS No.
_
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Applicable Optical Fiber
Cable Diameter
_
SM-9.5/125
CL710-0028-4
CL710-0029-7
CL710-0030-6
CL710-0031-9
CL710-0051-6
CL710-0052-9
AdPC polishing
PC polishing
Ø2mm
GI-50/125
AdPC polishing
ꢀPlug Housing for Duplex Ø2 Cable With Knob
Product Number
HRS No.
_
Applicable Optical Fiber
Cable Diameter
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Type of Polishing
PC polishing
HMUA-S2P1-F3QW-L
HMUA-S2P2-F3QW-L
HMUA-AS2P1-F3QW-L
HMUA-AS2P2-F3QW-L
HMUA-S2P1-F3PW-L
HMUA-S2P2-F3PW-L
HMUA-AS2P1-F3PW-L
HMUA-AS2P2-F3PW-L
_
SM-9.5/125
CL710-0061-0
CL710-0062-2
CL710-0034-7
CL710-0035-0
CL710-0053-1
CL710-0054-4
AdPC polishing
PC polishing
Ø2mm
GI-50/125
AdPC polishing
(NOTE 1) The "L" within the Product Number indicates the length of the cable illustrated in the diagram. Please
specify values in meter units.
(NOTE 2) We will custom manufacture a great variety of conversion cables and products other than the
aforementioned items to suit your needs.
17
ꢀPlug Housing for Simplex Ø0.9 Cable With Knob
Product Number
HMUA-SP1-F3L-L
HMUA-SP2-F3L-L
HMUA-ASP1-F3L-L
HMUA-ASP2-F3L-L
HMUA-SP1-F3M-L
HMUA-SP2-F3M-L
HMUA-ASP1-F3M-L
HMUA-ASP2-F3M-L
HRS No.
_
Applicable Optical Fiber
Cable Diameter
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Type of Polishing
PC polishing
_
SM-9.5/125
CL710-1001-3
CL710-1002-6
CL710-1003-9
CL710-1004-1
CL710-1005-4
CL710-1006-7
AdPC polishing
PC polishing
Ø0.9mm
GI-50/125
AdPC polishing
ꢀPlug Housing for Duplex Ø0.9 Cable With Knob
Product Number
HMUA-S2P1-F3L-L
HMUA-S2P2-F3L-L
HMUA-AS2P1-F3L-L
HMUA-AS2P2-F3L-L
HMUA-S2P1-F3M-L
HMUA-S2P2-F3M-L
HMUA-AS2P1-F3M-L
HMUA-AS2P2-F3M-L
HRS No.
_
Applicable Optical Fiber
Cable Diameter
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Type of Polishing
PC polishing
_
SM-9.5/125
CL710-1007-0
CL710-1008-2
CL710-1009-5
CL710-1010-4
CL710-1011-7
CL710-1012-0
AdPC polishing
PC polishing
Ø0.9mm
GI-50/125
AdPC polishing
(NOTE 1) The "L" within the Product Number indicates the length of the cable illustrated in the diagram. Please
specify values in meter units.
(NOTE 2) We will custom manufacture a great variety of conversion cables and products other than the
aforementioned items to suit your needs.
18
ꢀPlug Housing for Simplex Ø2 Cable Without Knob
Product Number
HMUJ-SP1-F3Q-L
HMUJ-SP2-F3Q-L
HMUAJ-ASP1-F3Q-L
HMUAJ-ASP2-F3Q-L
HMUAJ-SP1-F3P-L
HMUAJ-SP2-F3P-L
HMUAJ-ASP1-F3P-L
HMUAJ-ASP2-F3P-L
HRS No.
_
Applicable Optical Fiber
Cable Diameter
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Type of Polishing
PC polishing
_
SM-9.5/125
CL710-0040-0
CL710-0041-2
CL710-0042-5
CL710-0043-8
CL710-0057-2
CL710-0058-5
AdPC polishing
PC polishing
Ø2mm
GI-50/125
AdPC polishing
ꢀPlug Housing for Simplex Ø0.9 Cable Without Knob
Product Number
HRS No.
_
Notes
One end
Both ends
One end
Both ends
One end
Both ends
One end
Both ends
Applicable Optical Fiber
Type of Polishing
PC polishing
Cable Diameter
HMUAJ-SP1-F3A3-L
HMUAJ-SP2-F3A3-L
HMUAJ-ASP1-F3A3-L
HMUAJ-ASP2-F3A3-L
HMUAJ-SP1-F3B3-L
HMUAJ-SP2-F3B3-L
HMUAJ-ASP1-F3B3-L
HMUAJ-ASP2-F3B3-L
_
SM-9.5/125
CL710-0036-2
CL710-0037-5
CL710-0038-8
CL710-0039-0
CL710-0055-7
CL710-0056-0
AdPC polishing
PC polishing
Ø0.9mm
GI-50/125
AdPC polishing
(NOTE 1) The "L" within the Product Number indicates the length of the cable illustrated in the diagram. Please
specify values in meter units.
(NOTE 2) We will custom manufacture a great variety of conversion cables and products other than the
aforementioned items to suit your needs.
19
ꢀTools
ꢀOptical Plug Insertion and Withdrawal Tool
Product Number
HRS No.
Color of Tip Applicable Connector Housing
HMUA-TP-1
HMUB-TP-1
CL710-0074-1
CL710-0075-4
Blue
HMUA-A-1,2A-1,8A-1
HMUB-L2HA-1,L2HB-1
HMUB-L8HA-1,L8HB-1
Brown
ꢀOptical Plug Extraction Tool
Product Number
HMUB-TJ-1
HRS No.
Applicable Connector Housing
HMUB-L2PA-1,L8PA-1
CL710-0076-7
ꢀSleeve Holder Insertion and Withdrawal Tool
Product Number
HMUB-TS-1
HRS No.
Applicable Connector Housing
HMUB-L2PA-1,L8PA-1
CL710-0077-0
ꢀLocking Tools for Optical Plug Assembly
Product Number
HMUA-TK-1
HRS No.
Applicable Connector Housing
HMUA-P2-H2,H1
CL710-0080-4
HMUA-2P2-H2,H1
Product Number
HMUA-TK-2
HRS No.
Applicable Connector Housing
HMUAJ-P2-H2,H1
CL710-0081-7
20
相关型号:
©2020 ICPDF网 联系我们和版权申明