Bosch ltc-0498-21 信息指南
Q: What is the highest wavelength of IR light I can use
with the Bosch DinionXF Day/Night camera?
A: 940 nm
with the Bosch DinionXF Day/Night camera?
A: 940 nm
Q: Can IR light damage the imager if a bright source is
in the field of view?
A: No. Reflected IR radiation is always at a safe
operating level.
in the field of view?
A: No. Reflected IR radiation is always at a safe
operating level.
Q: What percentage of nighttime light is in the IR
spectrum?
A: At full moon (and depending the moon zenith), about
seven percent of the total radiation is in the IR spectrum
between 780 and 900 nm.
spectrum?
A: At full moon (and depending the moon zenith), about
seven percent of the total radiation is in the IR spectrum
between 780 and 900 nm.
Q: What is the advantage of using the 1/2-inch imager
over the 1/3-inch imager?
A: The 1/2-inch imager is more sensitive and, depending
on the quality of the lenses, its image contrast and
sharpness can outperform a 1/3-inch camera.
over the 1/3-inch imager?
A: The 1/2-inch imager is more sensitive and, depending
on the quality of the lenses, its image contrast and
sharpness can outperform a 1/3-inch camera.
Q: What impact does IR light have on the camera’s
wide dynamic range?
A: IR illumination itself does not change the wide
dynamic range. However, the reflection of IR light is
different from the reflection of visible light for most
materials. When the IR reflection is about equal for all
objects in a scene, it can cause images with less
contrast. The Dinion 2X Day/Night camera offers the
option to enhance the contrast in Night mode –
delivering the full benefit from wide dynamic range
behavior even in IR illuminated scenes.
wide dynamic range?
A: IR illumination itself does not change the wide
dynamic range. However, the reflection of IR light is
different from the reflection of visible light for most
materials. When the IR reflection is about equal for all
objects in a scene, it can cause images with less
contrast. The Dinion 2X Day/Night camera offers the
option to enhance the contrast in Night mode –
delivering the full benefit from wide dynamic range
behavior even in IR illuminated scenes.
Q: Can IR light be used to improve camera vision in
foggy scenes?
A: With the Dinion 2X Day/Night camera in Night mode,
exceptional images can be produced even in clubs and
restaurants where the camera is looking through smoke.
foggy scenes?
A: With the Dinion 2X Day/Night camera in Night mode,
exceptional images can be produced even in clubs and
restaurants where the camera is looking through smoke.
Q: How does the camera switch from day to night
mode (automatic, alarm input, Bilinx, profile mode
switching)?
A: Users can choose the method. The camera can switch
itself in automatic mode, but it can also be set up with
different modes (profiles) for daytime and nighttime
operation. Profile switching can be controlled via Bilinx
or the camera’s alarm input. The alarm input can also be
programmed to control Day/Night switching without
changing the profile. Of course, Bilinx can be used to
trigger the switching as well.
mode (automatic, alarm input, Bilinx, profile mode
switching)?
A: Users can choose the method. The camera can switch
itself in automatic mode, but it can also be set up with
different modes (profiles) for daytime and nighttime
operation. Profile switching can be controlled via Bilinx
or the camera’s alarm input. The alarm input can also be
programmed to control Day/Night switching without
changing the profile. Of course, Bilinx can be used to
trigger the switching as well.
Q: Are the switching levels for Day/Night mode
adjustable?
A: In automatic Day/Night switching mode, the video
level is the condition for switching into Night mode.
The actual switching level (20 to 80 IRE) is adjustable
through the setup menu. The light level for switching to
Day mode is a threshold (a fixed offset on top of the
level for switching into Night mode that is needed to
create hysteresis to prevent oscillation). The offset is
approximately 15 IRE.
adjustable?
A: In automatic Day/Night switching mode, the video
level is the condition for switching into Night mode.
The actual switching level (20 to 80 IRE) is adjustable
through the setup menu. The light level for switching to
Day mode is a threshold (a fixed offset on top of the
level for switching into Night mode that is needed to
create hysteresis to prevent oscillation). The offset is
approximately 15 IRE.
Q: IR-illuminated scenes sometimes appear dull, and
don’t show enough detail; is there anything to help
restore contrast?
A: In Night mode operation in an IR-illuminated
environment, the Dinion 2X camera offers the option to
enhance contrast. This prevents images from looking
dull and flat.
don’t show enough detail; is there anything to help
restore contrast?
A: In Night mode operation in an IR-illuminated
environment, the Dinion 2X camera offers the option to
enhance contrast. This prevents images from looking
dull and flat.
Q: My monitor is still showing a monochrome image
and the camera switched back to color mode; how can
this be resolved?
A: When going from Day to Night mode, some monitors
have difficulty if the camera switches the color burst off
and on. The Dinion 2X Day/Night camera offers the
option to have the color burst in the signal during Night
mode also (Mono Burst ON).
and the camera switched back to color mode; how can
this be resolved?
A: When going from Day to Night mode, some monitors
have difficulty if the camera switches the color burst off
and on. The Dinion 2X Day/Night camera offers the
option to have the color burst in the signal during Night
mode also (Mono Burst ON).
Q: How many years of operation can I expect from the
Dinion 2X Day/Night IR switching mechanism?
A: The IR switching mechanism is specified for 15,000
cycles (approximately 20 years of continuous camera
operation) with one switch to Night mode and one
switch to Day mode every 24 hours.
Dinion 2X Day/Night IR switching mechanism?
A: The IR switching mechanism is specified for 15,000
cycles (approximately 20 years of continuous camera
operation) with one switch to Night mode and one
switch to Day mode every 24 hours.
Q: What is the function of 2X-Dynamic and AutoBlack?
A: The combination of functions lets the camera fully
exploit its dynamic range capabilities, thus revealing all
of a scene’s details. Both ensure optimal contrast
reproduction in weather conditions such as fog, rain,
and snowfall.
A: The combination of functions lets the camera fully
exploit its dynamic range capabilities, thus revealing all
of a scene’s details. Both ensure optimal contrast
reproduction in weather conditions such as fog, rain,
and snowfall.
FAQs for Dinion 2X Day/Night Cameras (LTC 0498 & LTC 0630)