( This ( ( uses ( ( a ( ( ( 16 element ) reflective ) ( image slicer ) ) ) ( ( in which ) ( ( each ( of ( the ( flat mirrors ) ) ) ) ( is ( ( tilted ( at ( the ( appropriate angle ) ) ) ) ( to ( form ( the ( virtual slit ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ uses) (NP (NP (DT a) (ADJP (NP (CD 16) (NN element)) (JJ reflective)) (NN image) (NN slicer)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT each)) (PP (IN of) (NP (DT the) (JJ flat) (NNS mirrors)))) (VP (VBZ is) (VP (VBN tilted) (PP (IN at) (NP (DT the) (JJ appropriate) (NN angle))) (S (VP (TO to) (VP (VB form) (NP (DT the) (JJ virtual) (NN slit))))))))))) (. .)))
This uses a 16 element reflective image slicer in which each of the flat mirrors is tilted at the appropriate angle to form the virtual slit.
(ROOT (S (NP (DT A) (NN plane) (NN mirror)) (VP (VP (VBZ has) (NP (DT a) (ADJP (JJ flat) (JJ reflective)) (NN surface))) (CC and) (VP (VBZ forms) (NP (RB only) (JJ virtual) (NNS images)))) (. .)))