Tip & How-To about Miscellaneous

Singlet Lenses

Singlet lens is a lens consisting of a pure single element, which can be considered as the fundamental element of developing optical systems. Based on optical engineers' design, multiple singlet lenses might be utilized within an optical system with other optics.

As the basic optical element, singlet lenses are commonly used in engineers' design, and further assembly works for a variety of applications such as imaging collimating. At Hyperion Optics, our manufacturing capability covers Plano Concave/Convex, Bi-Concave, Bi-Convex, Positive and Negative Meniscus, ranged from many variations of optical glass and fused silica and even crystal. With our reliable coating technique, AR or V-coatings can be applied to reach expectation. Special treatment i.e. edge blackening / special packaging / labeling also available upon request.

Our singlet lenses production competency helps our customers to build their unique and cutting edge applications such as microscopy device, diameter 2.5mm~3.5mm design, for projection/ observation applications, we can deliver 180+mm in diameter singlet lens. Besides regular visible spectrum singlet lenses, NIR / SWIR/ / LWIR/ MWIR lens are also available at our facility, please refer to our IR optics for more information.


COMMERCIAL GRADE
FACTORY STANDARD PRECISION GRADE
Diameter Tolerance(mm) ±0.05 ±0.03 ±0.0125
Center Thickness(mm) ±0.01 ±0.03 ±0.025
Radius (%) ±1% ±0.5% ±0.3%
Focal Length Tolerance (%) ±3% ±1% ±0.5%
Cosmetic(MIL-C-13830A) 100-80 40-20 10-5
Figure Tolerance in ?(Pow/irreg) 3 - 1 2 - 1/4 1 - 1/10
Centration (Arc min) 6 <3 <1
Dia. To Thick Ratio 9~50:1
Coating (T% avg) 96-98% 99% 99.5%
Materials CDGM, Ohara, Schott & Infrared Materials
SINGLET LENSES
Configurations available:
Plano-Convex, Plano-Concave, Bi-Concave, Bi-Convex, Positive and Negative Meniscus
Optical Components Lens Assembly Optical Design Manufacturing Prototyping...

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i have a Hitachi 50v710 it has a yellow tint in the middle of the screen can this be fixed thanks


This tv is an LCD projection one. in it the image is generated this way: a bulb makes the light; this light is divided then passed thru 3 small LCD screens; the 3 pure color images are mixed together by a prism then passes thru a set of fine plastic lenses (this is called the optical engine) ; from there the final image is projected on a screen.
The entire image quality is determined by the quality of the optical engine - if something goes wrong with it it's clearly visible on the screen. In your case the heat of the bulb has deformed the first lens, and that has caused optical aberration - color shifting.
This is fixable, the optical engine will have to be replaced - you can't replace just a single lens, it's a sealed unit. Unfortunately it's not a practical solution: a new optical engine will cost you over $800.
Use the tv as is until you can save enough for a new one.

Nov 23, 2010 | Televison & Video

1 Answer

ND message


It might be an older CD player that can't read computer-made discs, or it could be a disc incapability... If you sure that the system supports the disc's format.. And it won't play other discs... try to clean the CD lens. CD lens cleaning discs: Every CD, stereo equipment, department, discount, store - and even sidewalk venders - carries CD lens cleaning discs. Are they of any value? Can they cause damage? I generally don't consider CD lens cleaning discs to be of much value for preventive maintenance since they may just move the crud around. However, for pure non-greasy dust (no tobacco smoke and no cooking grease), they may not hurt and could even do a good enough job to put off a proper cleaning for a while longer. However, it's also possible they will ruin the lens. Consider that the worst thing to do to a precision optical surface is to wipe it with a dry cloth as this is likely to scratch the surface as it rubs the dust over it. To the lens, a speck of dust is like a boulder. Once the lens is scratched, replacement of the entire optical pickup is the only remedy. And, since there are absolutely no sorts of standards for these things, it is possible for a really poorly designed cleaning disc to damage the lens even if the dust itself is non-abrasive. In addition, if the cleaning disc doesn't look like a CD to the optical pickup or disc-in sensor, the lens it may not even spin. So, the drawer closes, the drawer opens, and NOTHING has been accomplished! (But at least no damage will be done.) As if this isn't enough, NEVER put one into a high-X CDROM (DVD player or DVDROM drive). The high speed rotation may cause the cleaning disc and/or player/drive to self destruct. And, don't try a cleaning disc on an automotive CD player that sucks in the disk - it will get stuck.

Dec 26, 2005 | GE Slim Spacemaker 7-5295 CD Shelf System

1 Answer

Bad Disc


If you sure that the system supports the disc's format, the disc is clean, and its the right region.. try to clean the DVD lens. DVD lens cleaning discs: Every CD, stereo equipment, department, discount, store - and even sidewalk venders - carries CD lens cleaning discs. Are they of any value? Can they cause damage? I generally don't consider CD lens cleaning discs to be of much value for preventive maintenance since they may just move the crud around. However, for pure non-greasy dust (no tobacco smoke and no cooking grease), they may not hurt and could even do a good enough job to put off a proper cleaning for a while longer. However, it's also possible they will ruin the lens. Consider that the worst thing to do to a precision optical surface is to wipe it with a dry cloth as this is likely to scratch the surface as it rubs the dust over it. To the lens, a speck of dust is like a boulder. Once the lens is scratched, replacement of the entire optical pickup is the only remedy. And, since there are absolutely no sorts of standards for these things, it is possible for a really poorly designed cleaning disc to damage the lens even if the dust itself is non-abrasive. In addition, if the cleaning disc doesn't look like a CD to the optical pickup or disc-in sensor, the lens it may not even spin. So, the drawer closes, the drawer opens, and NOTHING has been accomplished! (But at least no damage will be done.) As if this isn't enough, NEVER put one into a high-X CDROM (DVD player or DVDROM drive). The high speed rotation may cause the cleaning disc and/or player/drive to self destruct. And, don't try a cleaning disc on an automotive CD player that sucks in the disk - it will get stuck.

Dec 20, 2005 | Emerson AV301 System

1 Answer

DVD won't play


Is this happens on every disc? The NO PLAY message appears when "The disc that this unit cannot play is loaded (from the user guide)". Maybe it's something to do with the DVD region? If you sure that the system supports the disc's format.. And it won't play other discs... try to clean the CD lens. CD lens cleaning discs: Every CD, stereo equipment, department, discount, store - and even sidewalk venders - carries CD lens cleaning discs. Are they of any value? Can they cause damage? I generally don't consider CD lens cleaning discs to be of much value for preventive maintenance since they may just move the crud around. However, for pure non-greasy dust (no tobacco smoke and no cooking grease), they may not hurt and could even do a good enough job to put off a proper cleaning for a while longer. However, it's also possible they will ruin the lens. Consider that the worst thing to do to a precision optical surface is to wipe it with a dry cloth as this is likely to scratch the surface as it rubs the dust over it. To the lens, a speck of dust is like a boulder. Once the lens is scratched, replacement of the entire optical pickup is the only remedy. And, since there are absolutely no sorts of standards for these things, it is possible for a really poorly designed cleaning disc to damage the lens even if the dust itself is non-abrasive. In addition, if the cleaning disc doesn't look like a CD to the optical pickup or disc-in sensor, the lens it may not even spin. So, the drawer closes, the drawer opens, and NOTHING has been accomplished! (But at least no damage will be done.) As if this isn't enough, NEVER put one into a high-X CDROM (DVD player or DVDROM drive). The high speed rotation may cause the cleaning disc and/or player/drive to self destruct. And, don't try a cleaning disc on an automotive CD player that sucks in the disk - it will get stuck.

Dec 18, 2005 | Yamaha DVX-S100 System

3 Answers

No Disc


If you sure that the system supports the disc's format.. and it wont play other discs... try to clean the CD lens. CD lens cleaning discs: Every CD, stereo equipment, department, discount, store - and even sidewalk venders - carries CD lens cleaning discs. Are they of any value? Can they cause damage? I generally don't consider CD lens cleaning discs to be of much value for preventive maintenance since they may just move the crud around. However, for pure non-greasy dust (no tobacco smoke and no cooking grease), they may not hurt and could even do a good enough job to put off a proper cleaning for a while longer. However, it's also possible they will ruin the lens. Consider that the worst thing to do to a precision optical surface is to wipe it with a dry cloth as this is likely to scratch the surface as it rubs the dust over it. To the lens, a speck of dust is like a boulder. Once the lens is scratched, replacement of the entire optical pickup is the only remedy. And, since there are absolutely no sorts of standards for these things, it is possible for a really poorly designed cleaning disc to damage the lens even if the dust itself is non-abrasive. In addition, if the cleaning disc doesn't look like a CD to the optical pickup or disc-in sensor, the lens it may not even spin. So, the drawer closes, the drawer opens, and NOTHING has been accomplished! (But at least no damage will be done.) As if this isn't enough, NEVER put one into a high-X CDROM (DVD player or DVDROM drive). The high speed rotation may cause the cleaning disc and/or player/drive to self destruct. And, don't try a cleaning disc on an automotive CD player that sucks in the disk - it will get stuck.

Dec 15, 2005 | Panasonic SC-AK300 CD Shelf System

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