BS 6493-1.5:1992

Committees responsible
National foreword
Recommendations
Chapter I. General
1. Introductory note
2. Scope
Chapter II. Terminology and letter symbols
1. Physical concepts
2. Types of devices
3. General terms
4. Terms related to ratings and characteristics
5. Letter symbols
Chapter III. Essential ratings and characteristics
Section 1. Light-emitting diodes
1. Type
2. Semiconductor material
3. Colour
4. Details of outline and encapsulation
5. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
6. Electrical characteristics
7. Supplementary information
Section 2. Infrared-emitting diodes
1. Type
2. Semiconductor material
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical characteristics
6. Supplementary information
Section 3. Photodiodes
1. Type
2. Semiconductor material
3. Details of outline and encapsulation
4. limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical characteristics
6. Supplementary information
Section 4. Phototransistors
1. Type
2. Semiconductor material
3. Polarity
4. Details of outline and encapsulation
5. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
6. Electrical characteristics
7. Supplementary information
Section 5. Photocouplers, optocouplers (with output
transistor)
1. Type
2. Semiconductor material
3. Polarity of the output resistor
4. Details of outline and encapsulation
5. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
6. Electrical characteristics
7. Supplementary information
Section 6. Laser diodes
1. Type
2. Semiconductor
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical and optical characteristics
6. Supplementary information
Section 7. Light-emitting diodes and infrared-emitting
diodes for fibre optic systems or subsystems
1. Type
2. Semiconductor material
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical and optical characteristics
6. Supplementary information
Section 8. Laser module with pigtails
1. Type
2. Semiconductor
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical and optical characteristics
6. Supplementary information
7. Hazard
Section 9. Pin photodiodes for fibre optic systems or
subsystems
1. Type
2. Semiconductor material
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical and optical characteristics
6. Supplementary information
Section 10. Avalanche photodiodes (APDs) with or without
pigtails
1. General
2 Visual inspection of displays
1. Type
2. Semiconductor
3. Details of outline and encapsulation
4. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
5. Electrical and optical characteristics
6. Supplementary information
Section 11. Visual inspection of monochrome matrix
     liquid crystal display modules
1 General
2 Visual inspection of displays
Section 12. Liquid crystal display cells (LCD cells)
(excluding active matrix LCD and multicolour cells)
1. Type
2. Principle and material used
3. Mode of operation
4. Details of outlines
5. Limiting values (absolute maximum system) over the
     operating temperature range, unless otherwise
     stated
6. Electrical and optical characteristics
7. Supplementary information
Section 10. Visual inspection of monochrome liquid
     crystal display cells
1 Scope
2 General
3 Visual inspection of displays
4 Seal inspections
5 Visual inspection of contact pad areas
6 Visual inspection for chipped material at the
     borders and edges of the support plate of cells
Chapter IV. Measuring methods
1. Measuring methods for photoemitters
2. Measuring methods for photosensitive devices
3. Measuring methods for photocouplers
4. Measuring methods for liquid crystal display
     devices.

Relevant terminology and letter symbols, essential ratings and characteristics and measuring methods.

This standard applies to the following categories or sub-categories of devices:

• Semiconductor photoemitters, including:
  • light-emitting diodes (LEDs);
  • infrared-emitting diodes (IREDs);
  • laser diodes and laser-diode modules;
  • optoelectronic displays (under consideration).
• Semiconductor photoelectric detectors, including:
  • photodiodes;
  • phototransistors.
• Semiconductor photosensitive devices, including:
  • photoresistors, photoconductive cells;
  • photothyristors (under consideration).
• Semiconductor devices utilizing optical radiation for internal operation, including:
  • photocouplers, optocouplers.

The sequence of the different chapters is in accordance with Publication 747-1, Chapter III, subclause 2.1.