1、ECMA-375 1stEdition / December 2006 Case for 120 mm HVD-ROM disk Ecma International Rue du Rhne 114 CH-1204 Geneva T/F: +41 22 849 6000/01 www.ecma-international.orgF Standard ECMA-375 Case for 120 mm HVD-ROM disk Standard ECMA-375 1stEdition / December 2006 .Introduction In October 2004 a group of
2、Companies, known as the HVD Alliance, proposed to Ecma to develop a standard for the first member of a family of holographic media. Ecma adopted this project and Ecma Technical Committee TC44 was established for the standardization of holographic media. This Standard ECMA-375 is the first standard f
3、or a read-only holographic disk case. This Ecma Standard has been adopted by the General Assembly of December 2006. - i -Table of contents Section 1 - General 11 Scope 12 Conformance 13 References 14 Definitions 14.1 cartridge 14.2 case 14.3 case reference plane 1 4.4 holographic disk 14.5 Holograph
4、ic Disk Cartridge (HDC) 1 4.6 Read Only Memory (ROM) disk 2 4.7 spindle 25 Conventions and notations 2 5.1 Representation of numbers 2 5.2 Names 26 Acronyms 27 General description 28 General requirement 28.1.1 Operating environment 2 8.1.2 Storage environment 3 8.1.3 Transportation 38.2 Temperature
5、shock 38.3 Safety requirements 38.4 Flammability 3Section 2 - Mechanical and physical characteristics 3 9 Dimensional, mechanical, and physical characteristics of the case 3 9.1 General description of the case 3 9.2 Reference axes and case reference plane 3 9.3 Case drawings 3- ii - 9.4 Dimensions o
6、f the case 4 9.4.1 Overall dimensions 4 9.4.2 Location hole 59.4.3 Alignment hole 59.4.4 Surfaces on Case Reference Plane P 5 9.4.5 Insertion slots and detent features 6 9.4.6 Gripper slots 69.4.7 Write-inhibit hole 79.4.8 Media identification sensor areas 7 9.4.9 Head and motor windows 7 9.4.10 Shu
7、tter 89.4.11 Shutter unlocking levers 8 9.4.12 Slider for shutter opener 9 9.4.13 Feature to prevent insertion into UDO, MO and WO drives 10 9.4.14 User label areas 10 9.5 Mechanical characteristics 10 9.5.1 Materials 10 9.5.2 Mass 10 9.5.3 Edge distortion 10 9.5.4 Compliance 10 9.5.5 Shutter openin
8、g force 10 9.5.6 Levers unlocking forces 10 9.6 Drop test 10 9.7 Electro-static discharge test 11 10 Interface between the case used as cartridge and a drive 25 10.1 Capture cylinder 25 10.2 Disk position in operating condition 25 Annex A (normative) Edge distortion test 27 Annex B (normative) Compl
9、iance test 29 Annex C (normative) Electro-static discharge test 33 Annex D (informative) Office environment 35 Annex E (informative) Transportation 37 - 1 -Section 1 - General 1 Scope This Ecma Standard specifies the characteristics of a case for use with a Read-only Holographic Versatile Disc (HVD-
10、ROM). This Ecma Standard specifies the environments in which the case is to be operated and stored; the dimensional and mechanical characteristics of the case, so as to provide mechanical interchangeability between data processing systems. This Ecma Standard provides for mechanical interchange betwe
11、en holographic disk drives. Together with a standard for 120 mm HVD-ROM disk and a standard for volume and file structure, it provides for full data interchange between data processing systems. 2 Conformance A disk case shall be in conformance with this Ecma Standard if it meets all mandatory requir
12、ements specified therein. 3 References The following standards contain provisions, which through reference in this text, constitute provisions of this Ecma Standard. At the time of publication, the editions indicated were valid. All standards are subjected to revision, and parties to agreements base
13、d on this Ecma Standard are encouraged to investigate the possibility of applying the most recent editions of the following standards. ECMA-287 (2002) Safety of electronic equipment ECMA-328 (2001) Detection and measurement of chemical emissions from electronic equipment 4 Definitions For the purpos
14、e of this Ecma Standard the following definitions apply. 4.1 cartridge A device consisting of a case containing a disk. 4.2 case The housing that protects the disk and facilitates disk interchange. 4.3 case reference plane A plane to which the dimensions of the case are referred. 4.4 holographic dis
15、k A disk that will accept and retain information in a holographic storage layer. 4.5 Holographic Disk Cartridge (HDC) A device consisting of a case containing a holographic disk. - 2 -4.6 Read Only Memory (ROM) disk A disk which can be only read. 4.7 spindle The part of the disk drive that contacts
16、the disk. 5 Conventions and notations 5.1 Representation of numbers A measured value is rounded off to the least significant digit of the corresponding specified value. For instance, it implies that a specified value of 1,26 with a positive tolerance of + 0,01 and a negative tolerance of - 0,02 allo
17、ws a range of measured values from 1,235 to 1,275. 5.2 Names The names of entities, e.g. specific surfaces, areas, etc. are given a capital initial. 6 Acronyms HDC Holographic Disk Cartridge HVD Holographic Versatile Disc HVD-ROM Holographic Versatile Disc Read Only Memory MO Magneto Optical UDO Ult
18、ra Density Optical WO Write Once 7 General description The case, which is the subject of this Ecma Standard, is a protective enclosure for a disk. It has access windows on each side covered by a shutter. The windows are automatically uncovered by the drive when the case is inserted into it. 8 Genera
19、l requirement 8.1.1 Operating environment The case conforming to the present standard containing a HVD-ROM disk, shall constitute a cartridge that shall meet the requirements of this clause. The cartridge shall provide for mechanical and data interchange in the following operating environment, defin
20、ed as the environment of air immediately surrounding the cartridge: Temperature 35 C 2 CAtmospheric pressure 60 kPa to 106 kPa Relative humidity 20 % to 80 % Absolute humidity 25 g/m3max. Air cleanliness Office environment (see Annex D) No condensation on or in the cartridge shall occur. If the cart
21、ridge has been exposed to conditions outside those specified in this clause, it shall be acclimatized in the operating environment for a time at least equal to the period during which it has been out of the operating environment, up to a maximum of 24 h. - 3 -8.1.2 Storage environment The case used
22、as a cartridge, without any protective enclosure, shall not be stored in an environment outside the range allowed for storage. The storage environment, defined as an environment where the air is immediately surrounding the cartridge, shall have the following properties for a cartridge containing a H
23、VD-ROM disk: Temperature 16 C to 32 C Atmospheric pressure 60 kPa to 106 kPa Relative humidity 20 % to 80 % Absolute air humidity 25g/m3max. No condensation on or in the cartridge shall occur. 8.1.3 Transportation This Ecma Standard does not specify requirements for transportation. Guidance for tran
24、sportation is given in Annex E. 8.2 Temperature shock The case used as a cartridge shall withstand a temperature shock of up to 10 C when inserted into, or removed from, the drive. 8.3 Safety requirements The case shall satisfy the safety requirements of Standards ECMA-287 and ECMA-328, when used in
25、 the intended manner or in any foreseeable use in an information processing system. 8.4 Flammability The case and its components shall be made from materials that comply with the flammability class for HB materials, or better, as specified in Standard ECMA-287. Section 2 - Mechanical and physical ch
26、aracteristics 9 Dimensional, mechanical, and physical characteristics of the case 9.1 General description of the case The case (see Figure 1) is a protective container of rectangular shape. It has windows on each side to allow the spindle of the drive to clamp the disk by its centre hole and to allo
27、w the head to access the disk. A shutter uncovers the windows upon insertion into the drive, and automatically covers them upon removal from the drive. The case has media identification, write-inhibit, mis-insertion features, detent for autoloading, gripper slots for an autochanger, label areas, and
28、 side identification inscriptions. 9.2 Reference axes and case reference plane There is a Case Reference Plane P on side A of the case. The Case Reference Plane P contains two orthogonal axes X and Y to which the dimensions of the case are referred. The intersection of the X and Y axes defines the c
29、entre of the location hole. The X-axis extends through the centre of the alignment hole. 9.3 Case drawings The case is represented schematically by the following drawings. Figure 1 shows a composite drawing of Side A of the case in isometric form, with the major features identified from this side. -
30、 4 -Figure 2 shows the envelope of the case with respect to a location hole at the intersection of the X and Y axes of Case Reference Plane P. Figure 3 shows the surfaces S1, S2, S3 and S4 that establish the Case Reference Plane P located on side A. Figure 3a shows the details of surface S3. Figure
31、4 shows the details of the insertion slots and detents. Figure 5 shows the gripper slots, used for automatic handling. Figure 6 shows the write-inhibit hole. Figure 7 shows the media identification sensor areas. Figure 8 shows the head and motor windows. Figure 9 shows the shutter opening features.
32、Figure 9a shows the locked/unlocked shutter levers configurations. Figure 9b shows the shutter slider. Figures 10a and 10b show the user label areas. 9.4 Dimensions of the case 9.4.1 Overall dimensions The total length of the case (see Figure 2) shall be L1= 153,0 mm 0,4 mm The distance from the top
33、 of the case to the reference axis X shall be L2= 127,0 mm 0,3 mm The distance from the bottom of the case to the reference axis X shall be L3= 26,0 mm 0,3 mm The total width of the case shall be + 0,0 mm L4= 135,0 mm - 0,6 mm The distance from the left-hand side of the case to the reference axis Y
34、shall be + 0,0 mm L5= 128,5 mm - 0,5 mm The distance from the right-hand side of the case to the reference axis Y shall be L6= 6,5 mm 0,2 mm The width shall be reduced on the top by the radius R1= L4originating from a point defined by L5and L7= 101,0 mm 0,3 mm The two corners of the top shall be rou
35、nded with a radius R2= 1,0 mm 0,5 mm and the two corners at the bottom with a radius R3= 3,0 mm 0,5 mm - 5 -The thickness of the case shall be L8= 11,00 mm 0,30 mm The eight long edges of the case shall be rounded with a radius R4= 1,0 mm max. 9.4.2 Location hole The centre of the location hole (see
36、 Figure 2) shall coincide with the intersection of the reference axes X and Y. It shall have a square form with a side length of + 0,00 mm L9= 4,10 mm - 0,06 mm held to a depth of L10= 2,4 mm 0,2 mm The lead-in edges shall be rounded with a radius R5= 0,5 mm max. 9.4.3 Alignment hole The centre of t
37、he alignment hole (see Figure 2) shall lie on reference axis X at a distance of L11= 122,0 mm 0,2 mm from the reference axis Y. The dimensions of the hole shall be + 0,00 mm L12= 4,10 mm - 0,06 mm and + 0,2 mm L13= 5,0 mm - 0,0 mm held to a depth of L10.The lead-in edges shall be rounded with radius
38、 R5.9.4.4 Surfaces on Case Reference Plane P The Case Reference Plane P (see Figure 3) located on Side A of the case shall contain four surfaces (S1, S2, S3 and S4) on that side of the case, specified as follows: - Two circular surfaces S1 and S2: Surface S1 shall be a circular area centred on the s
39、quare location hole and have a diameter of D1= 9,0 mm min. Surface S2 shall be a circular area centred on the rectangular alignment hole and have a diameter of D2= 9,0 mm min. - Two elongated surfaces S3 and S4 that follow the contour of the case: Surfaces S3 and S4 are shaped symmetrically on the t
40、wo top sides of the case. Surface S3 (see also Figure 3a) on the right hand side shall extend from a height defined by distance L7from the reference axis X to L14= 26,0 mm 0,3 mm - 6 -with a width of L15=1,35 mm 0,2 mm and a right hand side boundary with radius R6= 132,65 mm The top surface of the c
41、ase shall not be higher than the Reference Plane on a width L16= 4,15 mm min. located at the left hand boundary of S3. 9.4.5 Insertion slots and detent features The case shall have two insertion slots with embedded detent features (see Figure 4). These slots shall be symmetrical relatively to the tw
42、o long edges of the case. The slots shall have a length of L17= 44,0 mm 0,3 mm a width of + 0,3 mm L18= 6,0 mm - 0,0 mm and a depth of L19= 3,0 mm 0,1 mm located L20= 2,5 mm 0,2 mm from Case Reference Plane P. The slots shall have a lead-in chamfer given by L21= 0,5 mm max. L22= 5,0 mm max. The dete
43、nt notch shall be a semi-circle of radius R7= 3,0 mm 0,2 mm with the origin given by L23 = 13,0 mm 0,3 mm L24= 2,0 mm 0,1 mm L25= 114,0 mm 0,3 mm The dimensions L2, L23, and L25 are interrelated; their values shall be such so that they are all three within specification. 9.4.6 Gripper slots The case
44、 shall have two symmetrical gripper slots (see Figure 5) with a depth of L26= 5,0 mm 0,3 mm from the edge of the case and a width of L27 = 6,0 mm 0,3 mm The upper edge of a slot shall be L28= 12,0 mm 0,3 mm above the bottom of the case. - 7 -9.4.7 Write-inhibit hole The case shall have a write-inhib
45、it hole (see Figure 6). The case shall include a device for opening and closing this hole. When writing on the disk is not allowed, the write-inhibit hole shall be open all through the case. It shall have a diameter D3= 4,0 mm min. Its centre shall be specified by L29= 8,0 mm 0,2 mm L30= 111,0 mm 0,
46、3 mm on Side A of the case. When writing is allowed on the disk, the write-inhibit hole shall be closed, at a depth of typically L10, i.e. the wall thickness of the case. In this state, the opposite side of the hole, at Side B of the case, shall be closed and not recessed from the external surface o
47、f this side by more than L31= 0,4 mm max. 9.4.8 Media identification sensor areas Four media identifications sensor areas having close/open centred holes are used for identification of holographic cases/cartridges. These identification areas (see Figure 7) shall be located on Side A of the case with
48、 a diameter + 0,3 mm D4= 4,0 mm - 0,0 mm and centres specified by L32= 19,5 mm 0,2 mm and L30L33= 105,0 mm 0,3 mm L34= 17,0 mm 0,2 mm L35= 11,0 mm 0,2 mm A hole centred in one of these identification areas shall be deemed open if it extends through the case with a diameter D4.A hole is deemed to be
49、closed, when the identification area surface is not deviating from Case Reference Plane P by more than 0,3 mm. The case specified in this Ecma Standard shall have one open hole located in the sensor area specified by L32and L35.9.4.9 Head and motor windows The case shall have a window on each side to allow the spindle of the drive to clamp the disk by its centre hole and to allow the head to access the disk (see Figure 8). The dimensions are referenced to a centreline, located at a distance of L36= 61,0 mm 0,2 mm to
