Posted by admin | Posted in picture frames | Posted on 05-07-2010
Tags: convex, convex glass, convex glass for clocks, convex glass frame, convex glass picture frames, convex glasses, glass, home, mirror, patterned
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 Vtg Pair reverse painted convex curved glass silhouette pictures 4x5 inch $15.99 Time Remaining: 42m Buy It Now for only: $28.00 |
 See All N18 Circular Glass Indoor Convex Security Mirror 18 Diameter $44.00 Time Remaining: 22d 16h 7m Buy It Now for only: $44.00 |
 Vintage Ornate Oval Brass Metal Picture Frames Italy Convex Glass Ribbons Roses $31.00 (5 Bids) Time Remaining: 2h 5m |
 Plaster of Paris Picture Frame with Convex Glass $7.99 Time Remaining: 3h 8m |
 VINTAGE SILHOUETTE REVERSE PAINTING ON CONVEX BUBBLE GLASS 8 X 6 $12.50 (3 Bids) Time Remaining: 3h 50m |
 20x 30 Indoor Glass Convex Security Mirror NIB $62.65 Time Remaining: 1d 20h 26m Buy It Now for only: $62.65 |
 VINTAGE SILHOUETTE REVERSE PAINTING ON CONVEX BUBBLE GLASS 8 X 6 $16.49 (5 Bids) Time Remaining: 3h 50m |
 VINTAGE SILHOUETTE REVERSE PAINTING ON CONVEX BUBBLE GLASS 8 X 6 $11.49 (4 Bids) Time Remaining: 3h 50m |
 VINTAGE SILHOUETTE REVERSE PAINTING ON CONVEX BUBBLE GLASS 8 X 6 $11.49 (4 Bids) Time Remaining: 3h 50m |
 ViINTAGE CONVEX BUBBLE GLASS OCTAGON FRAME $34.99 Time Remaining: 26d 4h 21m Buy It Now for only: $34.99 |
 ANTIQUE OVAL WOOD GESSO FLOWER CONVEX BUBBLE GLASS FRAME FAMILY PHOTO NR $17.50 (3 Bids) Time Remaining: 3h 51m |
 ANTIQUE WOOD GESSO FLOWER CONVEX BUBBLE GLASS TRAY STYLE FRAME PHOTO NR $45.99 (7 Bids) Time Remaining: 3h 51m |
 Vintage Shabby Antique French Oval Convex Bubble Glass Photograph Picture Frame $29.00 (4 Bids) Time Remaining: 4h 33m |
 Vintage catherdal picture frame with convex bubble glass $75.00 Time Remaining: 9h 36m |
 00 01 INFINITI I30 CONVEX PASSENGER SIDE MIRROR GLASS $19.99 Time Remaining: 13d 5h 29m Buy It Now for only: $19.99 |
 Pr Framed Floral Print Prints w Convex Glass Metal Filigree Frame Italy 7 x 10 $8.95 Time Remaining: 13h 6m |
 VINTAGE PAIR SILHOUETTE REVERSE CONVEX CURVED GLASS PAINTED WESTERN PICTURES $33.00 (6 Bids) Time Remaining: 20h 48m |
 Antique Vintage Oval Oblong Octagon Wood Frame w Convex Bubble Glass $20.50 (4 Bids) Time Remaining: 21h 44m |
 Vintage COMMUNION Photograph ORNATE Frame BRASS FINISH Oval Convex Bubble Glass $125.00 Time Remaining: 26d 17h 5m Buy It Now for only: $125.00 |
 Antique Oval Oblong Octagon Wood Frame w Convex Bubble Glass Carved Flowers $33.00 (7 Bids) Time Remaining: 21h 59m |
 old wooden frame convex glass Jesus carying His Cross $28.97 (3 Bids) Time Remaining: 22h 51m |
 Vintage Reverse Painted Convex Glass Silhouette Picture COUPLE LOVERS KISS FALL $13.50 (4 Bids) Time Remaining: 23h 29m |
 ANTIQUE SMALL PICTURE FRAME w CONVEX GLASS BRASS w FLORAL PATTERN 3x4 $37.95 Time Remaining: 28d 20h 46m Buy It Now for only: $37.95 |
 PAIR OF CONVEX GLASS VICTORIAN SILHOUETTES $9.99 Time Remaining: 23h 50m |
 Antique Circa 1820s Unusual Reverse Painted Silhouette Painting Convex Glass $36.00 (7 Bids) Time Remaining: 1d 1h 35m |
 Silhouette Picture Pair Vintage Bubble Convex Glass Reverse Painted Portraits $16.99 (1 Bid) Time Remaining: 1d 2h 12m |
 VINTAGE GOLD DIPPED FLOWER OVAL FRAME PICTURE CONVEX GLASS CURVED GLASS RAISED $5.99 (1 Bid) Time Remaining: 1d 2h 26m |
 Antique Beautifully Hand Carved Oval Gold Gilt Frame w Original Convex Glass $135.00 Time Remaining: 28d 17h 28m Buy It Now for only: $135.00 |
 Antique Flower Art Prints in Convex Glass Round Wood Frames Peter Watson Studio $15.95 (1 Bid) Time Remaining: 1d 2h 26m |
 Antique Black Americana Photograph W Color Ornate Convex Bubble Glass 19 Frame $39.99 Time Remaining: 1d 2h 44m Buy It Now for only: $99.99 |
 Beautiful Vintage 6X8 Convex Glass Silhouette Horse and Carriage $15.75 Time Remaining: 1d 4h 46m Buy It Now for only: $18.75 |
 VW JETTA 05 09 RIGHT WING MIRROR GLASS 002RS CONVEX $12.68 Time Remaining: 4d 15h 53m Buy It Now for only: $12.68 |
 Reverse Painted Silhouette Picture Shephard Bubble Convex Glass Framed 6 X 8 $12.50 (3 Bids) Time Remaining: 1d 4h 52m |
 Reverse Painted Silhouette Picture Children Donkey Convex Glass Framed 6 X 8 $9.45 (1 Bid) Time Remaining: 1d 5h 5m |
 Set of 2 VINTAGE Curved Convex Glass SILHOUETTE Man Woman Dog PICTURES 4in x 5in $29.99 Time Remaining: 1d 5h 47m |
 Antique Arched Picture Frame Convex Glass Wood Metal $107.95 Time Remaining: 10d 21h 52m Buy It Now for only: $107.95 |
 VINTAGE Curved Convex Glass SILHOUETTE Mule COWBOY Western PICTURES 4in x 5in $24.99 Time Remaining: 1d 5h 51m |
 VINTAGE Curved Convex Glass SILHOUETTE Woman Child Fall Tree PICTURES 45x35 $19.99 Time Remaining: 1d 5h 54m |
 3 PIECES OF VINTAGE 6 x 8 CONVEX OVAL CLOCK OR PICTURE FRAME REPLACEMENT GLASS $7.99 Time Remaining: 1d 6h Buy It Now for only: $8.99 |
 5 PIECES OF VINTAGE CONVEX ROUND CLOCK OR PICTURE FRAME REPLACEMENT GLASS $9.99 Time Remaining: 1d 6h 5m Buy It Now for only: $11.99 |
 1910s oval convex glass reverse painting US Capital Washington DC orig frame $120.00 Time Remaining: 23d 20h 13m Buy It Now for only: $120.00 |
 5 PIECES OF VINTAGE CONVEX OVAL CLOCK OR PICTURE FRAME REPLACEMENT GLASS $4.99 Time Remaining: 1d 6h 8m Buy It Now for only: $5.99 |
 Antique Oval Frame w Convex Bubble Glass and Portrait of Young Girl $45.00 Time Remaining: 1d 7h 51m Buy It Now for only: $105.00 |
 Silhouette Reverse Picture In A Convex Glass Frame Vintage $9.99 Time Remaining: 1d 13h 44m |
 09 10 HONDA FIT CONVEX PASSENGER SIDE MIRROR GLASS $21.61 Time Remaining: 13d 6h 46m Buy It Now for only: $21.61 |
 PETER WATSON STUDIO CONVEX GLASS 6 ROUND FRAMED PRINT $3.99 Time Remaining: 1d 16h 56m |
 BIG VINTAGE CONVEX GLASS FRAME W PATRIOTIC SYMBOLS $74.99 Time Remaining: 1d 17h 29m Buy It Now for only: $175.00 |
 vintage PAIR ROUND 5 INCH PICTURE FRAMES black Gold Wood brass convex glass $9.99 Time Remaining: 1d 20h 38m |
 ANTIQUE WOOD PICTURE FRAME OVAL GOLD ORNATE GESSO CONVEX GLASS w WEDDING PHOTO $149.99 Time Remaining: 6d 23h 22m Buy It Now for only: $149.99 |
 Antique Early 1900s Convex Bubble Glass Brass Picture Frame Portrait Victorian $44.99 (1 Bid) Time Remaining: 1d 21h 29m |
 Vintage Peter Watsons Studio Virigin Mary Convex Bubble Glass Picture $20.00 Time Remaining: 1d 22h 10m |
 Antique Cast Brass Oval Frame W Convex Glass Child W US Flag Picture 165x27 $39.99 Time Remaining: 1d 22h 20m Buy It Now for only: $79.99 |
 VINTAGE LARGE CONVEX BUBBLE GLASS METAL PICTURE FRAME $18.00 Time Remaining: 1d 23h 57m |
 Antique Brass Oval Framed Convex Glass Praying Child Picture Photo GORGEOUS $129.00 Time Remaining: 28d 14h 5m Buy It Now for only: $129.00 |
 2 Lovely Antique Victorian Prints in Convex Bubble Glass frames $40.00 Time Remaining: 2d 17m |
 Vintage Antique Convex Bubble Glass Replacement for Clock or Picture $5.00 Time Remaining: 2d 1h 49m |
 VINTAGE CONVEX GLASS PAINTING COURTING COUPLE GLASS ONLY $9.99 Time Remaining: 2d 2h 56m |
 Antique Oval Gilt Decorated Frame w Convex Bubble Glass Ready for Your Art $144.99 Time Remaining: 17d 22h 30m Buy It Now for only: $144.99 |
 Vintage Silhouettes 4x5 Convex Bubble glass set of two $17.99 Time Remaining: 2d 3h 59m |
 Vintage Silhouettes 4x5 Convex Bubble Glass set of two $17.99 Time Remaining: 2d 4h 8m |
 Vintage Convex Bubble Glass James Papalia Ornate 67 Brass Picture Frame 9 $15.00 Time Remaining: 2d 4h 19m |
 ANTIQUE OLD VICTORIAN PICTURE FRAME ORNATE TIGER WOOD CONVEX GLASS w MAN PHOTO $149.99 Time Remaining: 19h 42m Buy It Now for only: $149.99 |
 Vintage Pair Reverse Painted Convex Glass Silhouette Pictures $30.00 Time Remaining: 2d 5h 46m |
 REVERSE PAINTING ON CONVEX GLASS ALL ORIGINAL VINTAGE WOOD OVAL FRAME $149.99 Time Remaining: 2d 5h 58m |
 Vintage Framed MOTHER Poem with Convex Glass $1.99 Time Remaining: 2d 16h 20m Buy It Now for only: $6.00 |
 Pair silhouettes colonial couple convex curved glass $19.95 Time Remaining: 2d 17h 39m |
 Large Antique Convex Bubble Glass Frame Portrait Girl Young Woman Vtg 20 x 14 $159.99 Time Remaining: 28d 4h 28m Buy It Now for only: $159.99 |
 9 ROUND CONVEX GLASS 2 5 8 AND ONE 2 9 16 FOR BABY BEN BIG BEN $0.99 Time Remaining: 2d 18h 59m |
 Vtg Sacred Heart Picture Jesus Virgin Mary Crucifix Convex Glass Brass Frame $29.99 (1 Bid) Time Remaining: 2d 20h 40m |
 ANTIQUE WOOD GESSO VICTORIAN OVAL CONVEX GLASS FLORAL PICTURE FRAME BEAUTY $59.99 (1 Bid) Time Remaining: 2d 20h 43m |
 Set of 5 Italy Convex Bubble Glass Floral Oval Picture Prints Metal Frames $55.00 Time Remaining: 25d 23h 53m Buy It Now for only: $55.00 |
 Antique Convex Glass Wood Picture Frames Wall Decor Shabby Weathered Chic Pink $134.99 Time Remaining: 2d 22h 12m |
 VINTAGE ART DECO CONVEX BUBBLE GLASS FLORAL FRAME $32.99 (1 Bid) Time Remaining: 2d 22h 35m |
 VINTAGE ART DECO CONVEX BUBBLE GLASS FLORAL FRAME $32.99 (1 Bid) Time Remaining: 2d 22h 50m |
 Antique FRENCH RIBBON BOW OVAL FRAME GILT METAL CONVEX GLASS Victorian $185.00 Time Remaining: 4h 54m Buy It Now for only: $185.00 |
 VINTAGE or ANTIQUE POST MORTEM PHOTO OF BABY BRASS FRAME CONVEX GLASS $31.99 (6 Bids) Time Remaining: 2d 23h 4m |
 Vintage Bubble Glass Convex Oval wood Frame Photo Lady 1920s $24.99 Time Remaining: 2d 23h 10m |
 Vintage Convex Bubble Glass Frame African American Young Boy Photo $36.00 (3 Bids) Time Remaining: 2d 23h 23m |
 VINTAGE PAIR ORNATE BRASS OVAL CONVEX BUBBLE GLASS FRAMES FLORAL PRINTS ITALY $25.00 Time Remaining: 2d 23h 26m |
 Antique Gold Wood Picture Frame Convex Glass Wedding Photo $106.24 Time Remaining: 19d 1h 23m Buy It Now for only: $106.24 |
 1 ANTIQUE Dome Bubble Convex Glass Oval Picture Frame MILITARY Tinted Photo $27.00 (2 Bids) Time Remaining: 3d 1h 8m |
 2 ANTIQUE Dome Bubble Convex Glass Oval Picture Frame vintage Tinted Photo $26.69 (3 Bids) Time Remaining: 3d 1h 11m |
 SET 2 Antique Victorian Art Deco Bubble Glass Convex Easel Portrait Frames Brass $26.99 (8 Bids) Time Remaining: 3d 1h 14m |
 LARGE ANTIQUE FRENCH OVAL BRASS CONVEX GLASS PICTURE FRAME WITH BEAUTIFUL DESIGN $185.00 Time Remaining: 27d 23h 37m Buy It Now for only: $185.00 |
 ANTIQUE Dome Bubble Convex Glass Oval Picture Frame vintage Baby Tinted Photo $36.00 (5 Bids) Time Remaining: 3d 1h 14m |
 VTG SET OF SILHOUETTE CONVEX GLASS PICTURES 8 X 6 $47.00 (1 Bid) Time Remaining: 3d 2h 8m |
 Set of 2 Vintage Gold Metal Convex Glass Picture Frames w Praying Farmer Wife $49.99 Time Remaining: 3d 2h 36m Buy It Now for only: $55.99 |
 CONVEX GLASS OVAL Wall Picture FRAME 13 X 10 MADE IN ITALY ACTUAL 6 X 85 $41.65 Time Remaining: 2d 4h 9m Buy It Now for only: $41.65 |
 ANTIQUE OVAL WOODEN FRAME WITH BUBBLE CONVEX GLASS $20.00 (1 Bid) Time Remaining: 3d 2h 40m |
 Antique bubble glass convex frame with photo of couple man uniform woman vintage $49.99 Time Remaining: 3d 2h 49m |
 Antique Octagon Convex Glass Framed Picture of Little Boy on a Tricycle $49.99 (1 Bid) Time Remaining: 3d 3h 2m |
 ANTIQUE CONVEX GLASS REVERSE BLACK SILHOUETTE PLASTER FRAME SCENE GARDEN WOMAN $19.99 (1 Bid) Time Remaining: 3d 3h 16m |
 1910s oval convex glass reverse painting Statue of Liberty NYC orig frame $100.00 Time Remaining: 23d 16h 2m Buy It Now for only: $100.00 |
 2 Reverse Paint Convex Glass Silhouette Pictures Ballroom Dancing $12.99 Time Remaining: 3d 3h 19m |
 VINTAGE CONVEX GLASS VATICAN PICTURE $7.00 Time Remaining: 3d 3h 25m |
 1920s CONVEX Bubble GLASS FRAME With GREAT Photo of young lady $39.99 (1 Bid) Time Remaining: 3d 4h 10m |
 12x 18 Indoor Glass Convex Safety Security Mirror NIB $36.99 Time Remaining: 1d 20h 26m Buy It Now for only: $36.99 |
 Vintage Silhouette Picture Reverse Painted Convex Glass Copper Frame $19.95 (1 Bid) Time Remaining: 3d 4h 17m |
 Vintage Danish Denmark brass picture frame with convex bow glass Sepia Child $27.02 Time Remaining: 3d 4h 17m |
 1920s CONVEX Bubble GLASS FRAME With GREAT Photo of lady $9.99 Time Remaining: 3d 4h 18m |
Convex Glass
Information on Magnification Glasses
Almost everyone has used a magnification glass at some point, whether it's to examine an object in science class or to make it easier to read the fine print of a document. And almost everyone has them lying around, these powerful devices that can make research and reading not just easier. For some, a magnifying glass makes it possible.
The Lens
The most important part of a magnification glass is the lens. The lens is the piece of glass that enlarges the image, by using a combination of light and refraction. While there are different types of lenses, the type used for magnification is a convex lens (meaning that the surface of the glass curves outward rather than inward).The curve of the lens must have complete axial symmetry to be effective---meaning that the curve of the lens is the same around the circle. When the light strikes the lens, it is refracted through the glass and makes anything viewed through the lens seem larger.
The First Magnifying Glass
The first magnifying glass was developed in approximately 1021 by Alhazen, an Arab/Persian scientist and mathematician. Alhazen was fascinated by the wonders of the human eye and how we perceive the world around us. He's often been credited with being the father of optical science and was also one of the first to experiment with optical illusions. He was the first to examine and calculate the magnifying principles of the lens, documented what is perhaps one of his most famous works, The Book of Optics. It was in this book that the details and constants of magnification, mirrors and refraction were first outlined.The magnifying glass became popular in Europe in the 12th and 13th centuries---after Alhazen's book was translated into Latin.
Focal Distance
Since the lens of the magnification glass is curved, the distance that the light must travel from the object, through the lens and into the eye of the person viewing it is different. This is why, when viewing an object through a magnification glass, the center of the object might be in sharp focus and become blurry near the edges. This is also why the viewer may find that moving the glass closer to or farther from the object will bring objects into sharper focus. Different people viewing the same object need to hold the glass at different distances to get the same effect. Each human eye is unique, and each individual must find the proper distances to get the desired effect, much like adjusting the field of a microscope.
Considerations
The amount that an object is magnified is also relative to an individual. While a glass might be rated at 2x (indicating that it will magnify the object two times), a person with poor eyesight might gain a more noticeable benefit from it. A magnifying glass typically works by bringing it closer to the eye in order to find what is called the near point---the point at which the image looks the clearest. In older individuals, the near point can be up to several meters away, making it seem as though the image is magnified much more than it would be to a younger person with a closer near point.
Limits
While magnification increases the size of the object and the detail that is visible, there is a limit to how much something can be magnified. The detail of an object can only be increased until it reaches the limit that the human eye can discern. Most hand-held magnifying glasses magnify an image about two times, or doubling the size and the amount of detail that can be seen.
About the Author
Get more and more varieties of magnifying glass with light here
Where can I buy a really big magnifying glass (Convex Lens) 20x20" or bigger? I have seen one in a photo.
try doing a Google search "Large convex lenses" or something similar.
But be aware of two things: (1)a halfway decent quality lens of that size is going to be $$$ and (2) it's going to be HEAVY!
Glass tops & convex glass