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Axis ANVE Exam - Topic 8 Question 124 Discussion

Why is germanium used for thermal camera lenses?
D) It is transparent to the infrared wavelengths
A) It is inexpensive
B) It has a low index of refraction
C) It has high optical dispersion

Axis ANVE Exam - Topic 8 Question 124 Discussion

Actual exam question for Axis's ANVE exam
Question #: 124
Topic #: 8
[All ANVE Questions]

Why is germanium used for thermal camera lenses?

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Suggested Answer: D

Germanium is used for thermal camera lenses because it is transparent to infrared wavelengths. This transparency allows infrared radiation to pass through the lens and reach the camera sensor, enabling the capture of thermal images. Germanium's optical properties make it an ideal material for thermal imaging applications. Reference: Axis Communications thermal camera specifications and technical documentation.


by Veronique at Apr 09, 2026, 06:06 AM

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Salena
5 hours ago
It's transparent to infrared wavelengths!
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Nenita
5 days ago
High optical dispersion? Not sure about that one.
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Destiny
11 days ago
Low index of refraction is a plus too!
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Kayleigh
16 days ago
Really? I thought it was too expensive for that.
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Marguerita
2 months ago
Totally agree, that's the main reason!
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Eve
2 months ago
It's transparent to infrared wavelengths!
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Ezekiel
3 months ago
I’m a bit confused; I thought germanium was chosen for its optical properties, but I can't recall if it was about dispersion or refraction.
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Fatima
3 months ago
I practiced a similar question about lens materials, and I think the transparency to infrared is definitely a key factor for thermal imaging.
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Laura
3 months ago
I remember studying about materials for lenses, and I feel like low index of refraction was mentioned, but it seems less relevant for thermal cameras.
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Kassandra
3 months ago
I think germanium is used because it's transparent to infrared wavelengths, but I'm not completely sure if that's the only reason.
upvoted 0 times
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