Fichas
Essential Optics (2017)
Fichas del conjunto (22)
- 1What do apertures do?Control the width of a beam of light
example: the iris - 2What do curved mirrors do to light?They control the focus of it
- 3What do filters do to light?Control the strength of light beams and/or change the spectral content of the beam
- 4What is the equation for transmittance (t)?X (light level after filter)/ Xo (light level before filter)
Note: always <1 - 5what is the equation for Density (ND)?= -log10 (transmittance)
Note: densities can be added - 6What is the range in nm of visible light?400-700nm
- 7What is light defined by?1. Wavelength (λ, nm)
2. Frequency (v, Hz)
3. Energy (E = hv) - 8What is the speed of light in a vacuum?3 x 10 (to the power) 8 m/s
- 9What is the equation that determines the speed of light (v) in a material?v = f λ
- 10What are the two assumptions of GEOMETRICAL OPTICS?1. Approximation that light travels in a straight line through a homogeneous medium.
2. At an interface, light is reflected OR refracted (not both). - 11How do you work out the sign of an angle?
- 12What is Snell's law?n sin (i) = n' sin(i')
- 13What is the critical angle?When refracted angle = 90 degrees
so, i = sin-1(n'/n)
Note: only when n' - 14When does total internal reflection occur?When incident angle is LARGER than the critical angle
- 15What is the equation to find the power of a spherical surface?F = C(n' - n)
- 16How do you find curvature of a spherical surface?C = 1/r
- 17What is the opening equation for paraxial ray tracing?h = -ul
Note: closing is h = -u'l' - 18What is the paraxial refraction equation?n'u' - nu = -hF
- 191. What is the lens equation? 2. What does it prove about paraxial images?n'/l' - n/l = F
Proves all refracted rays are concurrent (Point-point imaging). For every l there is one unique l'. - 20What is the paraxial transfer equation?h' = h + u'd
- 21Does flipping a lens (horizontally) change it's power?No
- 22How many powers does a thick lens have?FIVE
2 x surface powers (F1 and F2)
1 x equivalent power (F = n'/P'F')
2 x vertex powers (Fv and Fv')
Información
- Descripción
- key concepts of essential optics course (including equations)
- Creado por
- Jennifer Rogers
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- 64
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