Optical equipment
Transcript of Optical equipment
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OPTICAL EQUIPMENTOPTICAL EQUIPMENT
By Roesyah
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OPTICAL EQUIPMENTOPTICAL EQUIPMENT
Eye glasses magnifying glass camera microscope binoculars
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EyeEye
Eyes are one of the human senses of vision that serves as a tool.
Parts of the eye is important, among others;aquaeus humor, accommodation muscle, eye lens, cornea, pupil, iris, retina, vitreous humor, yellow spots, blind spots, and optic nerve.
Defects in the eye include:1. Myopia (nearsightedness)2. Hipermetropi (farsightedness)3. Presbiopi (old currency)4. astigmatism
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glassesglasses
Glasses are optical devices that serve as visual aids in eye defects.
For example Astigmatism eye defects assisted by cylindrical glasses.
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Loop (magnifying glass)Loop (magnifying glass)Loop is an optical instrument consisting of a convex lens
to see small objects to appear more clear and magnified.
The nature of the shadow on the loop that is virtual, erect and enlarged.Loop equation:
For maximum eye berakomodasi s' = -25 cm (negative sign (-) indicates a shadow in front of the lens) to obtain:
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cameracamera
The camera is a tool used to produce a photographic image on the film negative.
The camera consists of several parts, namely:Convex lensDiaphragmAperturePlates film
The nature of the shadow:1. real2. inverted3. minimized
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microscopemicroscope
microscope is an optical instrument used to see small objects that can not be seen directly by eye.
microscope consists of two convex lenses, namely;a. lens obyektifeb. ocular lens
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microscope observations
Microscope observations are divided into;a. microscope observation without accommodation:
M = (Sob '/ Sob) x (Sd / Fok)
b. Microscope observations with maximum accommodations:
M = (Sob '/ Sob) x [(Sd / Fok) +1]
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BinocularsBinoculars
Binoculars or a telescope is used to observe the optical objects are very far to look more closely and clearly.
1) Binocular Star Bias-Binoculars Binoculars-reflection
2.) Field Binoculars (Binoculars Earth)
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evaluationevaluation
A microscope has objekyive and eyepiece lens with a focal length of each 3cm and 4cm. The distance between the second lens is 25cm. Determine the amount of magnification of the microscope for the eye does not berakomodasi!
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Answer:
Objects located on the right
eyepiece focal point
fob = 3 cm
Fok = 4 cm
d = 25 cm where d = S'ob because
Sok +Sok = Fok = 4 cm
So: 25cm = S'ob + 4 cm
S'ob = 21 cm
Eyes not berakomodasi:
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