ANSI INCITS ISO IEC 13403-1995 Information technology - Information interchange on 300 mm optical disk cartridges of the write once read multiple (WORM) type using the CCS method (.pdf

1、INTERNATIONAL STANDARD ISO/IEC 13403 First edition 1995-l 2-l 5 Information technology - Information interchange on 300 mm optical disk cartridges of the write once, read multiple (WORM) type using the CCS method Technologies de /information - khange dinformation sur cartouches de disque optique de

2、300 mm de diam - the mechanical and physical characteristics of the cartridge, so as to provide mechanical interchangeability between data processing systems; - the format of the information on the disk, both embossed and user-written; - the characteristics of the embossed information on the disk; -

3、 the optical characteristics of the disk, enabling processing systems to write data onto the disk; - the minimum quality of user-written data on the disk, enabling data processing systems to read data from the disk. Together with the standard for Volume and File Structure, this International Standar

4、d provides for full data interchange between data processing systems. Interchange involves the ability to write and read data without introducing any error. 2 Conformance A 300 mm optical disk cartridge is in conformance with this International Standard if it meets all mandatory requirements specifi

5、ed herein. A drive claiming conformance with this International Standard shall be able, in the operating environment, to write on any optical disk cartridge which is in conformance with this International Standard and to read any such optical disk cartridge which has been written with any drive in c

6、onformance with this International Standard. A drive shall not claim conformance if it cannot accept the full range of media conforming to this International Standard. 3 Normative references The following standards contain provisions which components critical for tests in specific clauses only are s

7、pecified in those clauses. 9.1 Optical system The basic set-up of the optical system of the Reference Drive used for measuring the write and read parameters is shown in figure 1. Different components and locations of components are permitted, provided that the performance remains the same as that of

8、 the set-up in figure 1. The optical system shall be such that the detected light reflected from the entrance surface of the disk is minimized so as not to influence the accuracy of the measurements. The output Channel 1 is the sum of the currents through photo-diodes Jl, J2, 53 and 54, and is used

9、for reading embossed marks and user-written marks. The output of Channel 2 is the difference between current of photo- diodes JI and J3 and current of photo-diodes J2 and 54, and shall be used for the axial tracking. 9.2 Optical beam The focussed optical beam used for writing and reading data shall

10、have the following properties: Wavelength (1) Wavelength (h) divided by the numerical aperture of the objective lens (NA) :780 nm :;mn :h /NA = 1,475 mm *0,035 mm Filling D/W of the aperture of the objective lens : 1,0 max. Variance of the wavefront of the optical beam near the recording layer : h2/

11、180 max. The optical power and pulse width for writing and reading shall be as specified in 25.2.2,25.3,27.2.2 and 28.2.2. Polarization : circular D is the diameter of the lens aperture and W is the beam diameter of the Gaussian beam where the intensity is l/e2 of the maximum intensity. 9.3 Read cha

12、nnel (See annex N.) A read channel shall be provided to generate signals from the marks in the recording layer. Channel 1 shall be used for reading the embossed marks and reading the user-written marks. The read amplifier after the photodetectors in Channel 1 shall have a flat response within *l dB

13、from 100 kHz to 23 MHz. 9.4 Tracking The Tracking channel of the drive provides the tracking error signals to control the servos for the radial tracking of the optical beam. The radial tracking error is generated by a split photo-diode detector in the tracking channel. The division of the diode nms

14、parallel to the image of the tracks on the diode. OISO/IEC ISO/IEC 13403:1995(E) The requirements for the accuracy with which the focus of the optical beam must follow the tracks is specified in 20.2.4. 9.5 Rotation of the disk The spindle shall position the disk as specified in 12.5. It shall rotat

15、e the disk at 25,0 +nm (at operating environment). The distance from the left hand side of the case to reference plane Y shall be Ls=3OO,Omm -g -. The distance from the right hand side of the case to reference plane Y shall be L6 = 20,0 nUtIf 0,2 mltl R1 = 5,O mmf 1,O mm. The thickness of the case s

16、hall be L7 = 17,o mm f 0,4 mm (at testing environment) = 17,o mm f 0,s mm (at operating environment). The eight long edges of the case shall be rounded with a radius R;!=O,5mmmax. OISO/IEC ISO/IEC 13403:1995(E) 10.3.2 Location hole (See figure 3.) The Location hole shall have a rounded triangular sh

17、ape. The comers shall be rounded with a radius R3 = 5,O mm f 0,l mm. The centre of the radius of the bottom comer shall be the point of the intersection of the planes X, Y and Z. The angle of this comer shall be 01=30”* lo Lg=18,Omm;$m The Location hole shall be held to a depth L9= 1,5mmmin. Below L

18、9 the Location hole shall extend to Llo=8mmmin. with an area equal to, or greater than the Location hole. The Location hole shall not extend through Side B. The lead-in edges shall be rounded with a radius RLl = 0,5 mmmax. 10.3.3 Alignment hole (See figure 3.) The Alignment hole shall have a rounded

19、 rectangular shape. The vertical centre line of the hole shall lie L11 =28O,Omm* 0,2 mm from reference plane Y. Its dimensions shall be L13 = 14,o mm f 0,5 mm. The comers shall be rounded with a radius R5 = 5,O mmf 0,5 mm. The centres of the radii for the bottom comers shall lie in plane X. The Alig

20、nment hole shall be held to a depth L9, below which the Alignment hole shall extend to Llo, with dimensions equal to, or greater than, L12 and L13, respectively. The Alignment hole shall not extend through Side B. The lead-in edges shall be rounded with a radius R4. 10.3.4 Reference surfaces (See fi

21、gure 4.) Each side of the case shall contain four reference surfaces Sl, S2, S3 and S4. Surfaces S1 and S2 shall be circular with a diameter Ill = 24,0 mmmin. The centre of S1 shall be located on the plane Y and L14 = 4,0 mm* 0,2mm above the plane X. The centre of S2 shall be centred at Lls =280,0 m

22、m* 0,3 mm from the plane Y and L16= 4,0-h 0,2 - 9 ISO/IEC 13403:1995(E) OISO/IEC above the plane X. Surfaces S3 and S4 shall be circular with a diameter LIZ= 16,Ommmin. with their centres located at L17=255,Omm*O,3 mm from the plane X and Lls= 5,0mmI;-, The disk is divided into five annular zones, w

23、hich are, from the centre to the outer edge, centre zone, clamping zone, transition zone, information zone and rim zone. The nominal value of the thickness of the disk except centre zone shall be in the range of 2,4 mm to 5,2 mm the tolerances for each nominal value of the thickness shah be within *

24、 0,2 mm. The centre of all radii in 11.3 lie on axis A. The positions of the top and bottom surfaces of the disk include changes due to the axial deflection of the disk and variations in the overall thickness of the disk, caused by e.g. the protective layer and/or adhesive labels. The dimensions of

25、the disk shall be measured in the test environment. 11.3.1 Centre zone (See figure 13.) The centre hole shall have a diameter D5=35,0mm+1n The centre zone shall extend from the centre of the disk to R17= 30,O mmf 0,2 mm. 15 ISO/IEC 13403:1995(E) OISO/IEC 11.3.2 Clamping zone (See figure 13.) The,cla

26、mping zone shall extend from R17 to R18 = 38,0 mmf 0,2 mm. 11.3.3 Transition zone The transition zone shall extend from Rig to R19= 64,Omm*O,1mm. 11.3.4 Information zone The information zone shall extend from R19 to R20 = 142,0 mm f 0,l mm. 11.3.5 Rim zone The rim zone shall extend from R20 to media

27、 edge. 11.4 Mechanical characteristics All requirements in this clause must be met in the operating environment. 11.4.1 Material The disk shall be made from any suitable materials such that it meets the requirements of this International Standard. The only material properties specified by this Inter

28、national Standard are the properties of the substrate in the Information zone. The dimensions of the disk in an operating environment can be estimated from the dimensions in 11.3. 11.4.2 Mass The mass of the disk shall be 600 g max 11.4.3 Moment of inertia The moment of inertia of the disk relative

29、to axis A shall be 6,0 g*m2max. 11.4.4 Imbalance The imbalance of the disk relative to axis A shall not exceed 0,08 gsm. 11.4.5 Axial deflection The axial deflection of the disk in the Information zone is measured as the axial deviation of the recording layer, as seen by the optical head of the Refe

30、rence Drive (see clause 9). Thus it comprises the tolerances on the thickness of the substrate, on its index of refraction and the deviation of the entrance surface from plane P. The nominal position of the recording layer with respect to reference plane P is determined by the nominal thickness of t

31、he substrate. The deflection of any point of the recording layer in the information zone from its nominal position, in a direction normal to plane P, shah not exceed 0,5 mm for rotational frequencies of the disk up to 25,0 Hz. 16 OISO/IEC ISO/IEC 13403:1995(E) 11.4.6 Axial acceleration The maximum a

32、llowed axial error er- (See annex C.) shall not exceed il,O mm, measured using the Reference Servo for axial tracking of the recording layer. The rotational frequency of the disk shall be 25,0 Hz f 0,25 Hz. The stationary part of the motor is assumed to be motionless (no external disturbances). The

33、measurement shall be made using a servo with the transfer function where i=fi ,0=2rc,=2rc and c=3 or any other servo with Il+H within 20 % of Il+Hsl in the bandwidth of 25 Hz to 1,5 kHz. Thus, the disk shall not require an acceleration of more than 35 m/s2 at the frequencies lower than 1,5 kHz from

34、the servo motor of the Reference Servo. 11.4.7 Radial runout The radial runout of the tracks in the recording layer in the Information zone is measured as seen by the optical head of the Reference Drive. (See clause 9.) Thus it includes the distance between the axis of rotation of the spindle and re

35、ference axis A, the tolerances on the dimensions between axis A and the location of the track, and effects of non- uniformities in the index of refraction. The runout, defined as the difference between the maximum and minimum distance of the centre of any track from the axis of rotation, measured al

36、ong a fixed radial line over one revolution of the disk, shall not exceed 90 mm at a rotational frequency of the disk of 25,0 Hz f 0,25 Hz. 11.4.8 Radial acceleration The maximum allowed radial error enrax (see annex C) shall not exceed h 0,lO mm, measured using the Reference Servo for radial tracki

37、ng of tracks. The rotational frequency of the disk shall be 25,0 Hz f 0,25 Hz. The stationary part of the motor is assumed to be motionless (no external disturbances). The measurement shall be made using a servo with the transfer function H,(icn)=$ 2 ( ) 2 l+iOc/O, l+i63/co, where i=fi ,0=27cJ; w,=2

38、7c$, and c=3 or any other servo with Il+fl within 20 % of Il+Hsl in the bandwidth of 25 Hz to 1,5kHz. Thus, the disk shall not require an acceleration of more than 10 m/s2 for the frequencies lower than 1,5 kHz from the servo motor of the Reference Servo. 11.4.9 Tilt The tilt is the angle which the

39、normal to the entrance surface, averaged over an area of 1 mm diameter, makes with the normal to plane P. It shah not exceed 5 mrad in the Information zone. 17 ISO/IEC 13403:1995(E) OISOLIEC 11.5 Optical characteristics 11.5.1 Index of refraction The index of refraction of the substrate in the Infor

40、mation zone shall be within the range from 1,46 to 1,60. 11.5.2 Thickness of the substrate The thickness of the substrate, from the entrance surface to the recording layer, in the Information zone shall be 0,509z. n2 +0,265 n2 -1 n2 +0,593 mmFi0,050 mm where n is the index of refraction. 11.5.3 Bire

41、fringence The birefiingence of double-pass shall not exceed 100 run. 11.5.4 Reflectance The double-pass optical transmission of the substrate and the reflectance of the recording layer are measured together as the reflectance R of the disk. The measurement excludes the reflection of the entrance sur

42、face. The value of R at the standard wavelength specified in 9.2 shall lie within the range from 0,07 to 0,50 for all types of disks. The nominal value of R shall be specified in byte 3 of the PEP control data (See annex F.). The actual value Rm shall be measured with the focussed beam and wavelengt

43、h of the Reference Drive (See clause 9.). It shall be measured in any unrecorded, ungrooved area. At any point within the Information zone the value Rm shall be within f 12 % of the value of R 12 Interface between cartridge and drive 12.1 Clamping method When the cartridge is inserted into the drive

44、, the shutter of the case is opened and the drive spindle engages the disk. The disk is held against the spindle by an axial clamping force. The radial positioning of the disk is provided by the centring of the axle of the spindle in the centre hole. The turntable of the spindle shall support the di

45、sk in its clamping zone, dete r-mining the axial position of the disk. 12.2 Hub (See figure 13.) The disk shall have a hub as a clamping feature having the centre hole of diameter D5. The diameter of the hub shall be D 6 = 55,O mm f 0,2 mm and shall protrude L70= 2,5mm*O,1mm from the disk surface Th

46、e outer edge of the hub shall be rounded with a radius 18 OISO/IEC ISO/IEC 13403:1995(E) R21 = 0,2 mmmax. The material of the hub shall be a magnetizable material and the hub has twelve holes of diameter D7= 4,Omm*O,l mm. The holes shall be arranged along the circle of radius D8=43,omm*o,l mm. The d

47、epth of the holes shall be L71 = 2,0 mm min. The leading edge of the centre hole shall have the chamfer with an angle of e3= 15” f 0,2” to the direction of the axis A, and the depth of the leading edge of the centre hole shall be L72 = 1,5 mm f 0,l mm. 12.3 Clamping force The clamping force shall no

48、t exceed 22 N and the clamping device shall meet the requirements in annex J. 12.4 Capture cylinder (See figure 14.) The capture cylinder is defined as the volume in which the spindle can expect the centre of the hole in the hub to be, just prior to capture, and with the cartridge constrained as in

49、10.4.4. The centre of the the hole is defined as the point on axis A at a distance L72 from the plane defined by hub surface P (See 11.3.1 and figure 13 .). The size of the cylinder defines the permissible play of the disk disk inside its cavity in the case. The cylinder is referred to perfectly sized alignment and location pins in the drive; it includes the tolerances of those dimensions of the case and the disk which are between the two pins mentioned and the centre of the hub. The bottom of the cylinder is parallel to the plane Z, and shall be located a distance L73 = 0,5 mm mm.