A light modifier that is commonly used in studio photography is a honeycomb grid. It narrows...

A light modifier that is commonly used in studio photography is a honeycomb grid.

It narrows the beam of light to a circle with soft edges, as it can be seen here:

My question is: how is this happening?

A small reporter flash has a rectangular shape, if you place a rectangular shaped grid on it, it produces a "soft" circle of light. How is the light travel modified by the structure of the grid?

Expert Solution

From looking at the pictures of the grids provided on that website, I think I understand what they are doing. It's not actually very complicated.

It seems easiest to explain this if we consider only one of the hexagonal "tubes" formed by the grid. Normally, the light from a flash spreads out over some (relatively wide) angle, but now think of what happens to the light when it is confined to this tube: The light that would normally head off at a steep angle is intercepted by the walls of the tube, while light that was already propagating parallel (or at least close to parallel) to the tube axis is passed without obstruction. This results in a more confined range of angles over which the light can spread. Of course, the confinement is not perfect, as I will explain below, but you can imagine how the angular spread of the beam would be limited to consist only of those rays which can pass cleanly through the tube. This is simple geometry, and you could adjust this angle by varying the length and diameter of the tube.

However, the light that is intercepted by the tube walls is not completely eliminated. Instead it scatters into a random direction. It is this scattering that gives the resulting beam a nice soft edge. Instead of being sharply confined to the angular range allowed by the tube, the scattering allows it to "bleed" a little bit.

I should add that the hexagonal shape of the tubes probably has very little effect on the resulting illumination pattern. More likely a hexagonal shape was chosen for some other reason, like easy manufacturing or more mechanical stability. Optically, a square grid or even an array of circular tubes, like a bundle of straws, would work just fine

genius_generous answered 1 week ago

CPT code modifier 47 Anesthesia by Surgeon How modifier is used and scenario using the code.

Answer All Blanks (Analytical Chemistry): Xe lamp is commonly used as a light sources in ______________...

Answer All Blanks (Analytical Chemistry): Xe lamp is commonly used as a light sources in ______________ spectrometer, and only _______________ light source is used in atomic emission spectroscopy. A solution holder (i.e. cuvette) made of regular glass or plastic (such as polycarbonate, used commonly as a lens material in glasses) should not be used in UV-Vis spectroscopic measurements, because______________________________.

SnapShot Company, a commercial photography studio, has just completed its first full year of operations on...

SnapShot Company, a commercial photography studio, has just completed its first full year of operations on December 31, 2015. General ledger account balances before year-end adjustments follow; no adjusting entries have been made to the accounts at any time during the year. Assume that all balances are normal. Cash $2,150 Accounts Payable $1,910 Accounts Receivable 3,800 Unearned Photography Fees 2,600 Prepaid Rent 12,600 Common Stock 24,000 Prepaid Insurance 2,970 Photography Fees Earned 34,480 Supplies 4,250 Wages Expense 11,000 Equipment 22,800...

Trial Balance and Adjusting Entries Image, Inc., a commercial photography studio, has just completed its first...

Trial Balance and Adjusting Entries Image, Inc., a commercial photography studio, has just completed its first full year of operations on December 31. The general ledger account balances before year-end adjustments follow. No adjusting entries have been made to the accounts at any time during the year. Assume that all balances are normal. Cash $2,150 Accounts Payable $2,710 Accounts Receivable 3,600 Unearned Photography Fees 2,600 Prepaid Rent 12,600 Common Stock 24,000 Prepaid Insurance 2,970 Photography Fees Earned 34,480 Supplies 5,250...

staybolts are most commonly used in ------ boilers.

Leaf springs are commonly used in low-cost or high-stiffness vehicle suspensions, e.g. golf cars, light-truck rear...

Leaf springs are commonly used in low-cost or high-stiffness vehicle suspensions, e.g. golf cars, light-truck rear axle. Consider a cold-drawn AISI 1040 flat leaf spring subjected to a fluctuating loading condition of maximum and minimum stresses of 420 MPa and 140 MPa respectively for a total of 50,000 cycles. The loading condition of the spring then changes to maximum and minimum stresses of 350 MPa and -200 MPa respectively. Estimate the remaining life of the spring under the new loading...

Why is iron such a commonly used metal in metalloenzymes?

using code composer studio 1. write a program for the msp430fr6989 that will light LED1, whenever...

using code composer studio 1. write a program for the msp430fr6989 that will light LED1, whenever S1 is pressed. It should turn off whenever S1 is released. 2. Write a program that will make LED1 blink 5 times when S1 is pressed, and then stop.

to determine 1 whether modifier 59 is being used inappropriately to bypass medicare's national correct coding...

to determine 1 whether modifier 59 is being used inappropriately to bypass medicare's national correct coding initiative (CCI) edits and 2 to what extent Medicare carries are reviewing the use of modifier 59. What should CMS encourage carriers to do moving forward with regards to the use of modifier 59?

Aerial photography can be used to produce a variety of map products useful for landscape management...

Aerial photography can be used to produce a variety of map products useful for landscape management and engineering applications. i. Briefly explain how a Digital Elevation Model (DEM) of a landscape can be generated from overlapping aerial photographs. ii. What is an orthophoto? How does it differ from an aerial photograph? iii. A potentially very useful product that can be supplied to landscape managers and engineers is a ‘stereo-model’ that can be viewed, interpreted, and measured using heads-up 3-dimensional viewing...

Question