1、INTERNATIONAL STANDARD ISO/IEC 13481 First edition 1993-l 2-15 Information technology - Data interchange on 130 mm optical disk cartridges - Capacity: 1 gigabyte per cartridge Technologies de /information - khange de don - the environments in which the cartridges are to be operated and stored; - the
2、 mechanical, physical and dimensional characteristics of the case and 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, including the physical disposition of the tracks and se
3、ctors, the error correction codes, and the modulation method used; - the characteristics of the embossed information on the disk; - the magneto-optical characteristics of the disk, enabling processing systems to write data onto the disk; - the minimum quality of user-written data on the disk, enabli
4、ng data processing systems to read data from the disk. It also provides for interchange between optical disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data processing systems. Interchange involves the ability to write, read and eras
5、e data without introducing any error. 2 Conformance 2.1 Optical disk cartridges An ODC claiming conformance with this International Standard shall specify its Type. It shall conform to this International Standard if it meets all mandatory requirements specified herein for that Type. 2.2 Generating s
6、ystem A claim of conformance with this International Standard shall specify which Type(s) is (are) supported. A system generating an ODC for interchange shall be entitled to claim conformance with this Standard if it meets all mandatory requirements of this Standard for the Type(s) specified. 2.3 Re
7、ceiving system A claim of conformance with this International Standard shall specify which Type(s) is (are) supported. A system receiving an ODC for interchange shall be entitled to claim conformance with this International Standard if it is able to handle any recording made on the cartridge accordi
8、ng to 2.1 on the Type(s) specified. 1 fSO/IEC 13481:1993 (E) 3 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are
9、 subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 683-13:1986
10、, Heat treatable steels, alloy steels andfree-cutting steels - Part 13: Wrought stainless steels. IEC 950: 1991, Safety of information technology equipment, including electrical business equipment. 4 Definitions For the purposes of this International Standard the following definitions apply. 4.1 cas
11、e: The housing for an optical disk, that protects the disk and facilitates disk interchange. 4.2 Cyclic Redundancy Check (CRC): A method for detecting errors in data. 43 embossed mark: A mark so formed as to be unalterable by magneto-optical means. 4.4 entrance surface: The surface of the disk on to
12、 which the optical beam firs impinges. 4.5 Error Correction Code (ECC): An error-detecting code designed to correct certain kinds of errors in data. 4.6 field: A subdivision of a sector. 4.7 format: The arrangement or layout of information on the disk. 48 groove: See 4.11. 4.9 interleaviug: The proc
13、ess of allocating the physical sequence of units of data so as to render the data more immune to burst errors. 4.10 Kerr rotation: The rotation of the plane of polarization of an optical beam upon reflection from the recording layer, as caused by the magneto-optical effect. 4.11 land and grouve: A t
14、rench-like feature of the disk, applied before the recording of any information, and used to define the track location. The groove is located nearer to the entrance surface than the land with which it is paired to form a track. 4.12 mark: A feature of the recording layer which may take the form of a
15、 magnetic domain, a pit, or any other type or form that can be sensed by the optical system. The pattern of marks represents the data on the disk. NOTE - Subdivisions of a redor which are named “mult” are not ma components critical for tests in specific clauses only are specified in these clauses. 9
16、.1 Optical system The basic set-up of the optical system of the Reference Drive used for measuring the write, read and erase parameters is shown in figure 1. Different components and locations of components are permitted, provided that the performance remains the same as that of the set-up in figure
17、 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. 5 I!SO/EEC 13481:1993 (E) A B C Ch.1 Ch.2 D E F Laser diode Collimator lens Optical shaping prism Channel 1 Channel 2 Pol
18、arizing Beam splitter Leaky beam splitter Objective lens G Optical disk H Optical half-wave plate I Optical phase retarder J Polarizing beam splitter : mm and a depth of b2 = 3,0 mm f 0,l mm located bs = 2,5 mm f 0,2 mm from reference plane P. The slots shall have a lead-in chamfer given by , and L-
19、s4= 11,0mmf0,2mm on Side A of the case. 10.13 Media sensor holes seetigure9. There shall be two sets of four media sensor holes. The set of holes at the lower left hand comer of Side A of the case pertains to Side A of the disk. The holes shall extend through the case, and have a diameter of D, =4.0
20、 mm r,“i - . the positions of their centres shall be specified by L32, L34 and P mm The notch shall have a lead-out ramp with an angle A,=45“f2“ 10.18 User label areas See figure 14. The case shall have the following minimum areas for user labels: - on Side A and Side B: 35.0 mm x 65.0 mm - on the b
21、ottom side: 6.0 mm x 98.0 mm These areas shall be recessed by 0,2 mm min. Their positions are specified by the following dimensions and relations between dimensions (see figure 14). L61 = 4.5 mm min. L62-k1 = 65,O mm min. k4 -L63 = 35.0 mm min. L65 = 4.5 mm min. k6-Jk5 = 65,0 mm min. L67+ki8 = 35.0
22、mm min. 14 ISO/IEC 13481:1993 (E) J0 - 13.2.2 Height of the hub This height shall be hl = 2.2 mm ray - 13.2.3 Diameter of the centre hole The diameter of the centre hole shall be Dg = 4,004 mm r,“z- . 13.2.4 Height of the top of the centre hole at diameter D9 The height of the top of the centre hole
23、 at diameter Dg, measured above the disk reference plane, shall be h2 = 2.0 mm min. 13.2.5 Centring length at diameter D9 This length shall be h3 = 0.5 mm min. The hole shall have a diameter larger than, or equal to, Dg between the centring length and the disk reference plane. The hole shall extend
24、through the substrate. 16 13.2.6 Chamfer at diameter D9 The height of the outer chamfer of the centre hole of the hub shall be h4 = 0.2 mm max. The angle of the chamfer shah be 45. or a corresponding full radius shall be used. 13.2.7 Chamfer at diameter Ds The height of the chamfer at the rim of the
25、 hub shah be The angle of the chamfer shah be 45”. or a corresponding full radius shall be used. 13.2.8 Outer diameter of the magnetizable ring This diameter shall be Dlo = 19.0 mm min. 13.2.9 Inner diameter of the magnetizable ring This diameter shall be Drt = 8,0 mm max. 13.2.10 Thickness of the m
26、agnetizable material This thickness shah be &j = 0.5 mm min. 13.2.11 Position of the top of the magnetizable ring relative to the disk reference plane This position shah be h7 = 2,2 mm y,“p mn 13.3 Magnetizable material The magnetizable material shall be ferritic stainless steel (IS0 683-13, Type 8)
27、 or any suitable material with similar magnetic characteristics. 13.4 Clamping force The clamping force exerted by the spindle shall be less than 14 N. 13.5 Capture cylinder for the bub See figure 13. The capture cylinder is defined as the volume in which the spindle can expect the centre of the hol
28、e of the hub to be at the maximum height of the hub, just prior to capture. The size of the cylinder limits the allowable play of the disk inside its cavity in the case. This cylinder is referred to perfectly located and perfectly sized alignment and location pins in the drive, and includes toleranc
29、es of dimensions of the case and the disk between the two pins mentioned and the centre of the hub. The bottom of the cylinder is parallel to the reference plane P, and shall be located at a distance of Lss = 0,5 mm min. above the reference plane P of Side B of the case when Side A of the disk is to
30、 be used. The top of the cylinder shall be located at a distance of L59 = 4.3 mm max. above the same reference plane. The diameter of the cylinder shall be 17 ISO/IEC 13481: 1993 (E) D12 = 3.0 mm max. Its centre shall be defined by the nominal values of 46 and Ls,. 13.6 Diik position in tbe operatin
31、g condition See figure 13. When the disk is in the operating condition within the drive, the position of the active recording layer shall be & = 5.35 mm f 0,15 mm above reference plane P of that side of the case that faces the optical system. Moreover, the torque to be exerted on the disk in order t
32、o maintain a rotational frequency of 30 Hz shall not exceed 0.01 N.m, when the axis of rotation is within a circle with a diameter of 013 = 0.2 mm max. and a centre given by the nominal values of 46 and Ls 1. 18 ISO/IE 13481:1993 (El Disk reference plane P Id Clamping Zone I Clamping Zone Figure 2.
33、Hub dimensions 19 IsO/lEC 13481:1993 (E) Surface S4 figure 5 a) Slot for the shutter 1 D t oPeWfigt4ret2) / Shut, . Jser label area Jnsertion direction _ insertion slot and detent - Surface S, figures 5 a) and 5 b)l Motor window Media sensor holes for Side A (figure 9) Media sensor holes (figure 9) Write- inhibit hole for Side Gripper slot (figure 7) B Figure 3 - Perspective view of the case 20
