JB/T 8259.1-1998
Overhead projectors-projection stages dimensions (English Version)
- Standard No.
- JB/T 8259.1-1998
- Language
- Chinese, Available in English version
- Release Date
- 1998
- Published By
- Professional Standard - Machinery
- Status
- 2014-10
- Replace By
- JB/T 8259.1-2014
- Latest
- JB/T 8259.1-2014
- Scope
- This standard specifies the size of the projection table screen area, the size of the flat area, the position and size of the positioning pins, and the position of the projection head support rod of three types of square tabletop (type A, type B and type C) transmission projectors for teaching. The optical paths of these three projectors are shown in Figure 1. Among them, Type A and Type B are equivalent to ISO 7943.1 "Projector Projector Table Dimensions". This standard also stipulates the dimensions of three rectangular tabletop transmissive projector projection tables "Type A|(1), Type B|(1), Type C|(1)", which is suitable for low-box portable projectors. The optical paths of these three projectors are shown in Figure 2. This standard also specifies the dimensions of the projection table for reflective projectors. The light path of this projector is shown in Figure 3. This standard does not apply to other special-purpose projectors, excluding special equipment such as radiograph projection.
JB/T 8259.1-1998 history
- 2014 JB/T 8259.1-2014 Overhead projectors.Part 1: Film rolls, cores and winders.Dimensions
- 1998 JB/T 8259.1-1998 Overhead projectors-projection stages dimensions
