SINING
BEAUTY AT WELLNESS
CRAFTS
KULTURA AT KASAYSAYAN
LIBANGAN
KAPALIGIRAN
PAGKAIN AT INUMIN
REVERSE ENGINEERING
AGHAM
ISPORTS
TEKNOLOHIYA
MGA WEARABLE
Hand Lens 10×: a Small, Steep Lens Ground and Mounted
A 10× hand lens is a small convex lens of about 25 mm focal length: held close to the eye, its magnifying power is about a quarter of a metre divided by the focal length. Grind a small pair of discs to a steep curve as for any convex lens, then seat the convex one in a turned wooden ring with a cord to carry it.
The picture: a low-power reading magnifier on a dictionary page; a 10× hand lens works the same way with a much smaller, steeper lens.
Abantado
A week
Mga Tagubilin
1
1
Two small discs
Two small discs
Cut two small glass discs, about 15 mm across, from glass at least 5 mm thick (each face of the lens goes over a millimetre deep), and pitch each to a short wooden handle.
Mga materyales para sa hakbang na ito:
Plantsa ng salamin1 piraso
Pandikit na Dagta ng Pino10 g
Tira ng matigas na kahoy1 pirasoMga kailangang kasangkapan:
Panghiwa ng salamin
Plais na panggigil ng salamin
Salaming pangkaligtasan2
2
Grind to a steep curve
Grind to a steep curve
Grind them together with wet coarse grit, the same disc always on top, until the faces are steep enough (see the notebook). Then the second faces. The bottom disc is the lens.
Mga materyales para sa hakbang na ito:
Butil ng silicon carbide40 g
Tubig1 litroMga kailangang kasangkapan:
Digital na Kalibrador 6 Pulgada3
3
Fine grind and polish
Fine grind and polish
Fine grits, then polish both faces on a small pitch lap with tin oxide and water until clear.
Mga materyales para sa hakbang na ito:
Butil ng silicon carbide20 g
Tin oxide (stannic oxide)10 gPandikit na Dagta ng Pino30 g4
4
Check 10×
Check 10×
Focus the sun through it onto paper: the spot should be smallest about 25 mm from the lens. Grind deeper if it is longer.
Mga kailangang kasangkapan:
Ruler5
5
Turn the mount
Turn the mount
Turn a hardwood ring on the lathe with a seat a snug fit for the lens and a small lip. Press the lens in, warm a little pitch round the back edge to hold it, drill a hole in the rim for a cord loop.
Mga materyales para sa hakbang na ito:
Tira ng matigas na kahoy1 pirasoPandikit na Dagta ng Pino2 g
Sinulid na linen na may kandila0.5 mMga kailangang kasangkapan:
Torno sa kahoy
Paet na Hukay
Panghiwang pait sa pagliliyok
Papel de LihaDigital na Kalibrador 6 Pulgada6
6
Curve for 10×
Curve for 10×
Naglo-load ng Jupyter notebook…
7
7
Use
Use
Hold the lens close to your eye and bring the object up until it is sharp.
Mga Materyales
7- 1 pirasoPlaceholder
- Placeholder
- 1 pirasoPlaceholder
- Placeholder
- 1 litroPlaceholder
- Placeholder
- Placeholder
Mga Kinakailangang Kasangkapan
9- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
Ang blueprint na ito ay gumagawa ng
Kaugnay na Blueprint
Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo
CC0 Pampublikong Domain
Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.
Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.