Surveillance (CCTV)

Infrared Illumination for Camera Systems

Application - Surveillance (CCTV) - Security camera - Building

Covert light for clear images – infrared illumination for camera systems

Whether wide-range surveillance of parking lots, industrial sites or airports, video cameras in banks or number plate recognition at the gate of a company’s car park – Closed Circuit Television (CCTV) keeps a close watch. Many solutions benefit from adding infrared light. Camera sensors register this radiation which is hardly noticeable to the human eye, producing high-quality images.

Powerful IREDs facilitate compact illumination units for video and CCTV systems on an infrared basis. They substantially reduce the cost for packages, optics, reflectors and production. OSRAM Opto Semiconductors holds a leading position in the field of infrared LED illumination and supports manufacturers with ongoing power enhancement and comprehensive application know-how.

Systems with a long range

To cover ranges of 100 meters and more especially for outdoor applications, the illumination unit must supply an optical output of several watts. So far the infrared spotlights have been based on a large number of radial through-hole components. Radial IREDs come in a broad variety of emission angles which facilitate narrow, far-reaching light cones. However, these devices reach their limits when high power is required because they are restricted to low currents in continuous operation for thermal reasons.

Special high-power DC (direct current) or CW (continuous wave) packages allow higher currents because they dissipate considerably more thermal

losses. Thus the number of IREDs per spotlight is reduced. These products, such as the infrared OSRAM OSTAR®, reduce the board space significantly. Generally, IREDs in DRAGON®, OSLON® or OSRAM OSTAR® packages are recommended for long-range infrared spotlights.

For narrow light cones or for zoom systems which have to match the emission angle with the focal distance of the camera, DRAGON® or OSLON®

products are particularly well suited. For them a broad range of lenses is available with emission angles as low as 5° full width at half maximum.

Systems in buildings

For the surveillance of interior areas such as banks or museums, either IREDs with different emission angles are used, or the emission optics above the diodes are varied. In speed dome cameras a motor swivels the camera through 360° to cover larger areas. In this case very high optical power is required because each image segment must be adequately illuminated at very short exposure times. So far, the light sources in dome cameras have been mainly based on radial IREDs, but now manufacturers are increasingly favoring powerful diodes such as DRAGON® or OSLON® devices. These compact emitters are particularly attractive for small and efficient systems.

Automatic number plate recognition at gates calls for a special type of camera surveillance. In this case, the license plate of a moving car must be captured in optimum image quality to enable the image recognition software to read the characters correctly. To reduce the interfering effects of ambient light, the systems only use infrared light and have a filter in front of the camera sensor. For cameras mounted at gateposts, DRAGON®, OSLON® or Power TOPLED® devices are the ideal compact illumination solution.

5mm radials
SFH 4550/5/6/7, SFH 4545/6/7

IR Power TOPLED®
SFH 4240/50/50S

IR Power TOPLED® with lens
SFH 4248/9, SFH 4258/8S/9/9S

IR Platinum DRAGON®
SFH 4232/3/5

IR OSLON®
SFH 4715/15S/25S

IR OSRAM OSTAR® Lighting
SFH 4750

IR OSRAM OSTAR® Observation
SFH 4740/61

Pulsed Laser Diodes
SPL PL/LL

Surveillance
Automatic number plate recognition (ANPR)
CCTV
Industrial – machine vision
Machine vision/quality control
CCTV
Industrial – trafficcontrol
Intersection pre-emption
Biometrics
Vein/fingerprint recognition
Iris/face regognition
Automotive - interior
Driver monitoring
Occupancy detection
Automotive - exterior
ACC
Side vision
Pre-crash sensing/pedestrain protection
Night vision
Home interior
3D remote control
IR audio/video communication
Home exterior
CCTV, video communication/door control (intruder sensor)
Games
Gesture recognition (HMI)
Office
IR audio/video communication
CCTV
Non-glare presentation
IR OSLON® Black Series • SFH 4715

IR OSLON® Black Series

  • 850 nm (SFH 4715/4715S) and 940 nm (SFH 4725S) wavelength
  • Radiant intensity up to 500 mW/sr at 1 A (typ.)
  • Emitting angle +/– 45°
  • Active chip area 1 ×1 mm2
  • Low thermal resistance < 11 K/W
  • Pulse currents up to 5 A possible
  • Operating temperature range: – 40° to +125 °C
  • Suitable for all CMOS/CCD camera systems
SFH 4715 SFH 4715S SFH 4725S
IR Power TOPLED® with lens • SFH 4258S

IR Power TOPLED® with lens

  • 940 nm (SFH 4248/4249) and 850 nm (SFH 4258/4259/4258S/4259S) wavelength
  • Radiant intensity up to 110 mW/sr at 100 mA (typ.)
  • +/– 15° and +/– 25° lenses available
  • Operating temperature range: – 40° to +100 °C
  • Suitable for all CMOS/CCD camera systems IR POWER TOPLED®
SFH 4248 SFH 4249 SFH 4258 SFH 4259 SFH 4258S SFH 4259S
IR Platinum DRAGON®

IR Platinum DRAGON®

  • 850 nm (SFH 4232/4235/4232A) and 940 nm (SFH 4233) wavelength
  • Radiant intensity up to 320 mW/sr at 1 A (typ.)
  • Active chip area 1 ×1 mm2
  • Low thermal resistance < 9 K/W
  • Very high total radiant fl ux at 1 A DC
  • Pulse currents up to 5 A possible
  • Operating temperature range: – 40° to +100 °C
  • Suitable for all CMOS/CCD camera systems
  • Perfect solution also for gesture recognition (HMI) gaming applications
SFH 4232 SFH 4233 SFH 4235 SFH 4232A
IR OSRAM OSTAR® Lighting

IR OSRAM OSTAR® Lighting

  • Powerful LED array in a hexagonal package at 850 nm
  • Viewing angle: +/– 70°
  • Optical output power: 3.5 W
  • Pulse currents up to 5 A possible
  • Very low thermal resistance of 3 K/W
  • Operating temperature range: – 40° to +100 °C
SFH 4750
5mm Radials • SFH 4555

5mm Radials

  • Through-hole package, 850 and 940 nm wavelength, suitable for all CMOS/CCD camera systems
  • Available viewing angles: +/- 3°, +/- 5°, +/- 20° and +/- 30°
  • Radiant intensity up to 1, 100 mW/sr at 100 mA (typ.)
  • Operating temperature range -40° to +100°C
SFH 4550 SFH 4555 SFH 4556 SFH 4557 SFH 4545 SFH 4546 SFH 4547

The right amount of light for middle distances

Infrared LEDs optimized for indoor surveillance

07.09.2016 Spotlight

The SFH 4711A from Osram Opto Semiconductors is an economical solution for short-range closed circuit TV (CCTV) systems. This emitter offers the right optical output and emission characteristics for this application.

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