Can Vacuum Glazed Sunglasses Provide Maximum Eye Protection?

  • Thread starter Algren
  • Start date
  • Tags
    Vacuum
In summary: Thats what I'm wondering about, is this primarily because of low quality/normal glass?Normal glass would be fine, it's just that vacuum creates a better seal.
  • #1
Algren
74
1
Is there such a thing? Wouldn't such a thing give ultimate protection for the eyes?
I first thought i would post this in general engineering, b/c i have another question: How thick must the total eyepiece be if i need 2 semi-transparent sunglass material (of the size of a standard sunglass eyepeice) and a layer of vacuum between them?
 
Physics news on Phys.org
  • #2
Why do you expect a positive effect of a vacuum? Sunglasses are against electromagnetic radiation, if that radiation could not go through vacuum it wouldn't reach Earth anyway.
 
  • #3
mfb said:
Why do you expect a positive effect of a vacuum? Sunglasses are against electromagnetic radiation, if that radiation could not go through vacuum it wouldn't reach Earth anyway.
The prime reason of the vacuum being there is to prevent heat transfer, so that the eyes can stay warm, in temperatures like -30 celsius with strong winds.
 
  • #4
Generally, for very cold weather, people wear goggles. Sunglasses don't seal around the eyes, so insulation wouldn't do anything for them.
 
  • #5
russ_watters said:
Generally, for very cold weather, people wear goggles. Sunglasses don't seal around the eyes, so insulation wouldn't do anything for them.
Point. So then goggles with EM radiation and vacuum protection?
 
  • #6
Algren said:
Point. So then goggles with EM radiation and vacuum protection?
Astronaut helmets don't use multi-pane glass, so I don't see how extra insulation solves any real problems.
 
  • #7
russ_watters said:
Astronaut helmets don't use multi-pane glass, so I don't see how extra insulation solves any real problems.
Well, they have the vacuum for free.

You could reduce thermal conductivity with a layer of vacuum, but compared to other points of heat transfer the glass doesn't sound like a major problem. A vacuum would also mean that the glasses have to be quite thick and heavy.
 
  • #8
russ_watters said:
Astronaut helmets don't use multi-pane glass, so I don't see how extra insulation solves any real problems.
Right. Well, i guess that closes this case.
 
  • #9
mfb said:
quite thick and heavy.
Thats what I'm wondering about, is this primarily because of low quality/normal glass?
 
  • #10
It is primarily because flat glass is not very good in handling 105 Pa pressure difference.
 
  • Like
Likes Silicon Waffle

FAQ: Can Vacuum Glazed Sunglasses Provide Maximum Eye Protection?

What are vacuum glazed sunglasses?

Vacuum glazed sunglasses are a type of eyewear that uses vacuum technology to create a thin layer of insulation between two lenses. This insulation helps to reduce heat transfer and fogging, making them ideal for outdoor activities.

How do vacuum glazed sunglasses work?

Vacuum glazed sunglasses work by creating a vacuum seal between two lenses. This vacuum layer helps to reduce the amount of heat that is transferred between the inside and outside of the lens, keeping the lenses clear and preventing fogging.

What are the benefits of vacuum glazed sunglasses?

The main benefit of vacuum glazed sunglasses is their ability to reduce heat transfer and prevent fogging, making them perfect for outdoor activities. They also provide superior UV protection and are typically more durable than regular sunglasses.

Are vacuum glazed sunglasses more expensive than regular sunglasses?

Yes, vacuum glazed sunglasses tend to be more expensive than regular sunglasses due to the advanced technology and materials used in their construction. However, the added benefits and durability make them a worthwhile investment.

Can vacuum glazed sunglasses be prescription glasses?

Yes, vacuum glazed sunglasses can be made with prescription lenses. Many eyewear companies offer this option for those who require corrective lenses and want the benefits of vacuum glazed sunglasses.

Similar threads

Calculating the Maximum Velocity of a Sheep in a Vacuum
Replies
26
Views
7K
I Questions about Negative Pressure and Vacuum Energy
Replies
5
Views
2K
What STEM project can I do to fascinate an examination board?
Replies
14
Views
1K
Calculating thickness/exoskeleton vacuum chamber
Replies
4
Views
9K
A "The 7 Strangest Coincidences in the Laws of Nature" (S. Hossenfelder)
2
Replies
62
Views
5K
How Do You Build a Vacuum Chamber That Can Manipulate Internal Objects?
Replies
20
Views
25K
A Higgs inflation and quadratic gravity
Replies
1
Views
2K
Birefringence and Automotive Window Tinting
Replies
9
Views
7K
Max specific energy (energy density by mass) in a capacitor
Replies
5
Views
3K
What is the definition of Engine Load
Replies
3
Views
61K

Hot Threads

Recent Insights

Back
Top