Question

direct light processing (dlp)
use the information below to answer the question.
although both direct light processing (dlp) and stereolithography (sla) are part of
the vat polymerization (vat) process, there are several characteristics unique to (dlp).
similarities and differences
one similarity between (dlp) and (sla) is that forms are printed in a vat of resin. both
processes also come in two different configurations: top - down and bottom - up.
however, one major difference with (dlp) is that it does not use a laser. this process
uses an ultra violet (uv) light source to cure the polymer resin.
printing process
in the bottom - up version, (dlp) forms are printed in the same fashion as (sla), where
the bottom of the vat has a transparent base, allowing a light source to shine up
through onto the polymer material. in direct light processing, there are two different
methods used to shine the uv light. one version uses mirrors to direct the light along
the x and y axis, similar to a (sla) printer. the other model uses a panel of leds to
flash the entire layer at once, curing the portions of material specified by the design
program.
advantages of (dlp)
both of these methods will build forms layer by layer, repeating the process until the
build is complete. however, the model that uses a panel of leds usually creates parts
much faster, is more direct, and has fewer moving parts than the version that uses
mirrors to direct the light. because each layer created in (dlp) can be printed as a full
“slice”, rather than a portion of the layer at a time, this process can build forms much
faster than parts created in (sla).
what 3d printing method is direct light processing (dlp)
similar to?
fused filament fabrication (fff)
material jetting (mj)
powder bed fusion (pbf)
stereolithography (sla)

Explanation:

The text clearly states that one similarity between DLP and SLA is that forms are printed in a vat of resin and both have top - down and bottom - up configurations.

Answer:

Stereolithography (SLA)