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When using an external IR illuminator, what can happen if the beam angle is significantly narrower than the field of view?
Suggested Answer: C
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When using an external IR illuminator with a beam angle significantly narrower than the field of view, the exposure may be uneven. This can result in parts of the image being overexposed (too bright) while other parts remain underexposed (too dark). Ensuring that the beam angle of the IR illuminator matches the field of view of the camera is essential for achieving uniform illumination across the entire surveillance area. Reference: Axis Communications IR Illumination Guide
32 comments · newest first
MA
Maxima
10 months ago
I've heard heat can mess with the image quality.
SE
Sean
11 months ago
Focus must be set manually too, right?
DA
Daniel
11 months ago
Wait, are you sure about that?
ZE
Zena
11 months ago
Totally agree, that makes sense!
DA
Dannette
11 months ago
The exposure may be uneven.
TI
Tina
11 months ago
I definitely remember that if the beam angle is too narrow, it can lead to uneven lighting in the field of view.
JO
Joanna
12 months ago
I feel like I read that a narrower beam could cause issues, but I can't recall if it was about heat distortion or exposure.
MI
Ming
12 months ago
I think I came across a similar question in practice, and I want to say it was about uneven exposure too. That seems to make sense.
DA
Dahlia
1 year ago
I remember something about beam angles and how they can affect exposure, but I'm not sure if it's uneven exposure or something else.
VI
Vincent
1 year ago
I feel good about this one. The narrower beam angle will cause an uneven exposure, so C is the right answer.
BA
Bambi
1 year ago
Okay, I've got it. If the beam angle is narrower, the exposure will be uneven across the field of view. That's the key thing to remember here.
AD
Adelle
1 year ago
I'm pretty sure the answer is C - the exposure may be uneven. That makes sense if the beam angle is narrower than the field of view.
AN
Antione
1 year ago
Hmm, this one seems tricky. I'll need to think it through carefully.
CO
Cora
1 year ago
Wait, I'm a bit confused. Could the heat also distort the image? I'm not 100% sure on that one.
LU
Luis
1 year ago
I think this might be similar to the concept of trustless transactions we practiced. Not sure how it all connects though.
AL
Alethea
2 years ago
Wait, is the IR illuminator secretly a heat lamp in disguise? B is the hottest pick for sure!
HA
Hayley
2 years ago
The backlight increasing? What is this, a disco party? D is clearly the wrong answer.
JE
Jerry
2 years ago
B) Heat can distort the image
EM
Emelda
2 years ago
C) The exposure may be uneven
JA
Janet
2 years ago
A) Focus must be set manually
TI
Tish
2 years ago
Hmm, if the beam is too focused, I wonder if you'd have to manually adjust the focus. A could be the right choice here.
PU
Pura
2 years ago
Ooh, I bet the heat from the narrower beam would totally distort the image! B seems like the way to go.
TI
Tiera
2 years ago
It's important to consider the beam angle to avoid any distortion in the image.
DO
Dorathy
2 years ago
I agree, B seems like the best option in this case.
DO
Donte
2 years ago
I think you're right, heat can definitely distort the image.
LE
Leah
2 years ago
I believe the correct answer is C) The exposure may be uneven because the light won't cover the entire field of view.
DO
Dorthy
2 years ago
I agree with Dulce, a narrow beam angle can cause uneven exposure.
GE
Gennie
2 years ago
If the beam angle is narrower than the field of view, the exposure will definitely be uneven. C is the correct answer.
ST
Stevie
2 years ago
C) The exposure may be uneven
NA
Nana
2 years ago
B) Heat can distort the image
NI
Nikita
2 years ago
A) Focus must be set manually
DU
Dulce
2 years ago
I think if the beam angle is narrower, the exposure may be uneven.