LewDude
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I've been looking for some decent right-angle prisms, but trying to keep budget at a minimum. In the end, this means spending some extra on ebay in order to find the right option(s), but end up with a review that may or may not help someone else wondering what's available on a budget.
I started receiving some earlier this week, and waited until I had a few to look at before starting this. I'll update this thread as more arrive. [Updated 9/26 with 4th option!]
So far here is what I have:
Link to buy: http://a.co/d/9rtomn3
Link to buy: https://www.ebay.com/itm/182876201434
Link to buy: https://www.ebay.com/itm/182917273908
Link to buy: https://ebay.us/rOZhPc
Chart of power transmission / power loss for 3 wavelengths:
A pic of 1st 3 side by side (from L to R , option 3,2,1)
Option 1: Amazon set of 2, different sizes.
$17.76
Delivery Time to US: 3 Days
From Description:
Power Transmission: .0587/.0680 = 86.3%
Note: These are acrylic. They work, but not as well as the glass options. Fast shipping via Amazon Prime.
Option 2: Ebay, 1 piece
$12.98
Delivery time to US: 12 Days
From Description:
Power Transmission: .0496/.0680 = 72.9%
Note: Hypotenuse plane is coated on the outside and therefore provides very good reflectivity. EDIT ... power test does not support this
Option 3: Ebay, 10 pcs, all same size
$9.99
Delivery time to US: 12 Days
From Description:
Power Transmission: .0598/.0680 = 87.9%
Note: As stated in the description: "Please note prism's dimension." You have to look at the extra pictures to get the dimensions. Essentially its 10.5mm on the square sides. Here is a pic of the dimensions:
Option 4: Ebay, 2 pcs, same size
$14.50
Delivery time to US: 30 Days
From Description:
Power Transmission: .0810/.0882 = 91.8%
Samples of items in action:
Option 1 (placed in line after option 2. So the 2nd and 3rd prism are "Option 1":
IMAG5981 by Lewie Wilkinson, on Flickr
IMAG5980 by Lewie Wilkinson, on Flickr
Option 2:
IMAG5976 by Lewie Wilkinson, on Flickr
IMAG5973 by Lewie Wilkinson, on Flickr
Option 3:
IMAG5965 by Lewie Wilkinson, on Flickr
IMAG5970 by Lewie Wilkinson, on Flickr
Dot on beamstop after 10 prisms is pretty good:
IMAG5971 by Lewie Wilkinson, on Flickr
In summation:
Right now, I'm pretty happy with both options 2 and 3. I think option 2 will be used the most, but we'll see. It's fun to have 10 of the small ones - might lend to some creativity down the line. I have some more on the way - like I stated above, I'll update the post when they arrive.
A random involving option 1:
2018-08-30_12-18-00 by Lewie Wilkinson, on Flickr
I started receiving some earlier this week, and waited until I had a few to look at before starting this. I'll update this thread as more arrive. [Updated 9/26 with 4th option!]
So far here is what I have:
Link to buy: http://a.co/d/9rtomn3
Link to buy: https://www.ebay.com/itm/182876201434
Link to buy: https://www.ebay.com/itm/182917273908
Link to buy: https://ebay.us/rOZhPc
Chart of power transmission / power loss for 3 wavelengths:
A pic of 1st 3 side by side (from L to R , option 3,2,1)
Option 1: Amazon set of 2, different sizes.
$17.76
Delivery Time to US: 3 Days
From Description:
Right Angle Prism Set - Small Right Angle Prism, 1.4" (35mm) Hypotenuse, 1" (25mm) Sides and Large Right Angle Prism, 2.9"(74 mm) Hypotenuse, 2" (50mm) Sides
Product features
Clear polished surfaces
90 degrees X 45 degrees X 45 degrees
Refractive index close to optical glass
Can produce rainbow from a non-monochromatic light source such as sun light
All edges have slight bevel
Power Transmission: .0587/.0680 = 86.3%
Note: These are acrylic. They work, but not as well as the glass options. Fast shipping via Amazon Prime.
Option 2: Ebay, 1 piece
$12.98
Delivery time to US: 12 Days
From Description:
1PC 25.4x25.4x25.4mm 45 90 Degree K9 Optical Glass Right Angle Triangular Internal Inside Reflecting Prism Science Survey For Lazyglasses
Specification
90 Degree K9 Optical Glass Right Angle Triangular Internal Reflecting Prism
Material: K9 Optical Glass
Size:25.4x25.4x25.4mm
Dimension Tolerance +/-0.1mm
Angle Tolerance +/- 3
Power Transmission: .0496/.0680 = 72.9%
Note: Hypotenuse plane is coated on the outside and therefore provides very good reflectivity. EDIT ... power test does not support this
Option 3: Ebay, 10 pcs, all same size
$9.99
Delivery time to US: 12 Days
From Description:
10PCS Optical Triangular Glass Right Angle Prism For Optics Light Science Survey Experiment Physics Teaching Light Spectrum 90 Degree Angle
Specification
Optical glass Triangular Right Angle prism
Material: Optical glass
Quantity: 10 pieces
Please note prism's dimension.
Power Transmission: .0598/.0680 = 87.9%
Note: As stated in the description: "Please note prism's dimension." You have to look at the extra pictures to get the dimensions. Essentially its 10.5mm on the square sides. Here is a pic of the dimensions:
Option 4: Ebay, 2 pcs, same size
$14.50
Delivery time to US: 30 Days
From Description:
25mmx25mmx25mm optical triple prism right triangle
Physics Education Light refraction
Materials:K9 optical glass
Size:25mmx25mmx25mm
Equilateral right-angle triangle.
Quantity:2PCS
Power Transmission: .0810/.0882 = 91.8%
Samples of items in action:
Option 1 (placed in line after option 2. So the 2nd and 3rd prism are "Option 1":
IMAG5981 by Lewie Wilkinson, on Flickr
IMAG5980 by Lewie Wilkinson, on Flickr
Option 2:
IMAG5976 by Lewie Wilkinson, on Flickr
IMAG5973 by Lewie Wilkinson, on Flickr
Option 3:
IMAG5965 by Lewie Wilkinson, on Flickr
IMAG5970 by Lewie Wilkinson, on Flickr
Dot on beamstop after 10 prisms is pretty good:
IMAG5971 by Lewie Wilkinson, on Flickr
In summation:
Right now, I'm pretty happy with both options 2 and 3. I think option 2 will be used the most, but we'll see. It's fun to have 10 of the small ones - might lend to some creativity down the line. I have some more on the way - like I stated above, I'll update the post when they arrive.
A random involving option 1:
2018-08-30_12-18-00 by Lewie Wilkinson, on Flickr
Last edited: