Automotive night vision
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An automotive night vision system is a system to increase a vehicle driver's perception and seeing distance in darkness or poor weather beyond the reach of the vehicle's headlights. They are currently offered as optional equipment on certain premium vehicles.
- instrument cluster using a high resolution liquid-crystal display (LCD), newest type
- navigation system or information screen, least expensive and with display's location further away from driver's field of vision (used exclusively by BMW, and the W212 E-class)
- windshield via head-up display, earliest type, dimmer knob can reduce brightness, display nearest to driver's line of sight
Active systems use an infrared light source built into the car to illuminate the road ahead with light that is invisible to humans. There are two kinds of active systems: gated and non-gated. The gated system uses a pulsed light source and a synchronized camera that enable long ranges (250m) and high performance in rain and snow.
- Pros: higher resolution image, superior picture of inanimate objects, works better in warmer conditions, smaller sensor can be mounted to rearview mirror.
- Cons: does not work as well in fog or rain, lower contrast for animals, shorter range of 150-200 meters or 500-650 feet
In late-2005, Mercedes-Benz introduced their Night View Assist system on the redesigned S-class. It was the first system to use the instrument cluster's LCD as a display. In 2009, Mercedes added a pedestrian detection function calling the revised system Night View Assist Plus and offered it on the redesigned E-class and refreshed S-class, however, the E-class uses the navigation screen's display. For model year 2014, S-class with Night Vision Assist Plus will also have animal detection. To give further warning, the Nigh View Assist PLUS system is coupled to the car’s spotlight function which is able to focus a beam of light onto the pedestrian or animal while flashing them repeatedly. Night Vision Assist is no longer available for the new E-class.
In 2002, Toyota introduced the first production automotive active night vision system or Night View on the Lexus LX 470 and Landcruiser Cygnus. This system uses the headlight projectors emitting near infrared light aimed like the car's highbeam headlights and a CCD camera then captures that reflected radiation, this signal is then processed by computer which produces a black-and-white image which is projected on the lower section of the windshield. In 2008 Toyota added a feature to the Crown Hybrid which highlights pedestrians and presents them in a box on an LCD display in front of the driver, this was the first pedestrian detection feature for an active system.
- Pros: greater range of about 300 meters or 1,000 feet, higher contrast for living objects
- Cons: grainy, lower resolution image, works poorly in warmer weather conditions, larger sensor
The Night Vision Assistant was introduced in 2010 on the Audi A8. It uses a thermal imaging camera behind the four rings at the front of the car which can "see" 300 meters (984 ft) ahead. The display in the instrument cluster highlights humans with yellow markings. More importantly, the computer can determine if the person on the road moves in a way that could lead to a collision with the car. In that case the pedestrian is being marked in red color and the driver of the car receives an audible warning.
In fall 2005, BMW introduced BMW Night Vision on the 7-series. This system processes far infrared radiation, which minimizes non-essential information placing a greater emphasis on pedestrians and animals, allows for a range of 300 meters or nearly 1,000 feet, and avoids "dazzle" from headlights, road lights and similar intense light sources. In the fall of 2008, on the redesigned 7-series, BMW added a pedestrian detection system which flashes a caution symbol on the navigation/information screen and head-up-display when it detects pedestrians.
For model year 2013, BMW Night Vision added animal detection with Dynamic Light Spot feature for the 7-series. As soon as the remote infrared detects pedestrians or larger animals on course for collision in the dark, the system directs two separately controlled Dynamic Light Spots at them without creating an unpleasant glare. In the event of an acute risk, an acoustic warning signal is also sounded and the brakes are set to maximum standby. For the model year 2014, BMW 5-series will also have these new features.
In 2000, General Motors introduced Night Vision on the Cadillac Deville which became the first vehicle sold with such a system, however it was discontinued in 2004. This system was developed with Raytheon and worked by using an infrared sensing camera mounted behind the vehicle's grille. Infrared radiation is picked up by the sensor, processed by computer and then displayed on the windshield using a head-up display. Information is displayed as a black and white image with warmer objects in white, while cooler objects appear black. Because this system outputs a standard NTSC composite video signal and the used parts are somewhat easy and inexpensive to find, it has become a popular choice for fitting thermal night vision to other vehicles.
In the fall of 2004, Honda introduced the redesigned Legend with an optional Intelligent Night Vision system. This system detected far infrared radiation and was also the first system to offer pedestrian detection. The pedestrian detection feature alerted the driver with an audio warning and visually enclosed the pedestrian in a box on the display which was presented via head-up display.
- 2002-2007 Lexus LX 470 (windshield)
- 2009 Lexus LS (instrument cluster)1
- 2006 Mercedes CL-class (instrument cluster)
- 2009 Mercedes E-class (navigation screen)1
- 2005 Mercedes S-class (instrument cluster)
- 2009 Mercedes S-class (instrument cluster)1
- 2008 Toyota Crown Hybrid (instrument cluster)1
- 2002 Toyota Landcruiser Cignus (windshield)
- 2011 Under development BrightEye Gated long range system
- 2011 Audi A6 (instrument cluster)1
- 2010 Audi A8, Audi A7 (instrument cluster)1
- 2005 BMW 5-series (navigation screen)
- 2008 BMW 5-series (navigation screen)1
- 2005 BMW 7-series (navigation screen)
- 2008 BMW 7-series (navigation screen)1
- 2011 BMW 6-series (navigation screen)1
- 2000-2004 Cadillac (windshield)
- 2004 Honda Legend (windshield)1
- 1 includes pedestrian detection
- Adaptive headlamp
- Automatic highbeam headlamp
- CCD camera
- Infrared radiation
- Intelligent car
- Night vision
- Active infrared night vision
- Pedestrian detection
- Thermographic camera
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